Merely because I find it so fascinating, I am posting an excerpt from the Platonic dialogue, Phaedo, wherein Plato attempts to show that the philosopher must have a certain desire for death. Socrates has been condemned to death, and seeks to convince his friends that he has good reason not to be afraid in such circumstances.
And now I will make answer to you, O my judges, and show that he who has lived as a true philosopher has reason to be of good cheer when he is about to die, and that after death he may hope to receive the greatest good in the other world. And how this may be, Simmias and Cebes, I will endeavor to explain. For I deem that the true disciple of philosophy is likely to be misunderstood by other men; they do not perceive that he is ever pursuing death and dying; and if this is true, why, having had the desire of death all his life long, should he repine at the arrival of that which he has been always pursuing and desiring?
Simmias laughed and said: Though not in a laughing humor, I swear that I cannot help laughing when I think what the wicked world will say when they hear this. They will say that this is very true, and our people at home will agree with them in saying that the life which philosophers desire is truly death, and that they have found them out to be deserving of the death which they desire.
And they are right, Simmias, in saying this, with the exception of the words "They have found them out"; for they have not found out what is the nature of this death which the true philosopher desires, or how he deserves or desires death. But let us leave them and have a word with ourselves: Do we believe that there is such a thing as death?
To be sure, replied Simmias.
And is this anything but the separation of soul and body? And being dead is the attainment of this separation; when the soul exists in herself, and is parted from the body and the body is parted from the soul-that is death?
Exactly: that and nothing else, he replied.
And what do you say of another question, my friend, about which I should like to have your opinion, and the answer to which will probably throw light on our present inquiry: Do you think that the philosopher ought to care about the pleasures-if they are to be called pleasures-of eating and drinking?
Certainly not, answered Simmias.
And what do you say of the pleasures of love-should he care about them?
By no means.
And will he think much of the other ways of indulging the body-for example, the acquisition of costly raiment, or sandals, or other adornments of the body? Instead of caring about them, does he not rather despise anything more than nature needs? What do you say?
I should say the true philosopher would despise them.
Would you not say that he is entirely concerned with the soul and not with the body? He would like, as far as he can, to be quit of the body and turn to the soul.
That is true.
In matters of this sort philosophers, above all other men, may be observed in every sort of way to dissever the soul from the body.
That is true.
Whereas, Simmias, the rest of the world are of opinion that a life which has no bodily pleasures and no part in them is not worth having; but that he who thinks nothing of bodily pleasures is almost as though he were dead.
That is quite true.
What again shall we say of the actual acquirement of knowledge?-is the body, if invited to share in the inquiry, a hinderer or a helper? I mean to say, have sight and hearing any truth in them? Are they not, as the poets are always telling us, inaccurate witnesses? and yet, if even they are inaccurate and indistinct, what is to be said of the other senses?-for you will allow that they are the best of them?
Certainly, he replied.
Then when does the soul attain truth?-for in attempting to consider anything in company with the body she is obviously deceived.
Yes, that is true.
Then must not existence be revealed to her in thought, if at all?
And thought is best when the mind is gathered into herself and none of these things trouble her-neither sounds nor sights nor pain nor any pleasure-when she has as little as possible to do with the body, and has no bodily sense or feeling, but is aspiring after being?
That is true.
And in this the philosopher dishonors the body; his soul runs away from the body and desires to be alone and by herself?
That is true.
Well, but there is another thing, Simmias: Is there or is there not an absolute justice?
Assuredly there is.
And an absolute beauty and absolute good?
But did you ever behold any of them with your eyes?
Or did you ever reach them with any other bodily sense? (and I speak not of these alone, but of absolute greatness, and health, and strength, and of the essence or true nature of everything). Has the reality of them ever been perceived by you through the bodily organs? or rather, is not the nearest approach to the knowledge of their several natures made by him who so orders his intellectual vision as to have the most exact conception of the essence of that which he considers?
And he attains to the knowledge of them in their highest purity who goes to each of them with the mind alone, not allowing when in the act of thought the intrusion or introduction of sight or any other sense in the company of reason, but with the very light of the mind in her clearness penetrates into the very fight of truth in each; he has got rid, as far as he can, of eyes and ears and of the whole body, which he conceives of only as a disturbing element, hindering the soul from the acquisition of knowledge when in company with her-is not this the sort of man who, if ever man did, is likely to attain the knowledge of existence?
There is admirable truth in that, Socrates, replied Simmias.
And when they consider all this, must not true philosophers make a reflection, of which they will speak to one another in such words as these: We have found, they will say, a path of speculation which seems to bring us and the argument to the conclusion that while we are in the body, and while the soul is mingled with this mass of evil, our desire will not be satisfied, and our desire is of the truth. For the body is a source of endless trouble to us by reason of the mere requirement of food; and also is liable to diseases which overtake and impede us in the search after truth: and by filling us so full of loves, and lusts, and fears, and fancies, and idols, and every sort of folly, prevents our ever having, as people say, so much as a thought. For whence come wars, and fightings, and factions? whence but from the body and the lusts of the body? For wars are occasioned by the love of money, and money has to be acquired for the sake and in the service of the body; and in consequence of all these things the time which ought to be given to philosophy is lost. Moreover, if there is time and an inclination toward philosophy, yet the body introduces a turmoil and confusion and fear into the course of speculation, and hinders us from seeing the truth: and all experience shows that if we would have pure knowledge of anything we must be quit of the body, and the soul in herself must behold all things in themselves: then I suppose that we shall attain that which we desire, and of which we say that we are lovers, and that is wisdom, not while we live, but after death, as the argument shows; for if while in company with the body the soul cannot have pure knowledge, one of two things seems to follow-either knowledge is not to be attained at all, or, if at all, after death. For then, and not till then, the soul will be in herself alone and without the body. In this present life, I reckon that we make the nearest approach to knowledge when we have the least possible concern or interest in the body, and are not saturated with the bodily nature, but remain pure until the hour when God himself is pleased to release us. And then the foolishness of the body will be cleared away and we shall be pure and hold converse with other pure souls, and know of ourselves the clear light everywhere; and this is surely the light of truth. For no impure thing is allowed to approach the pure. These are the sort of words, Simmias, which the true lovers of wisdom cannot help saying to one another, and thinking. You will agree with me in that?
But if this is true, O my friend, then there is great hope that, going whither I go, I shall there be satisfied with that which has been the chief concern of you and me in our past lives. And now that the hour of departure is appointed to me, this is the hope with which I depart, and not I only, but every man who believes that he has his mind purified.
Certainly, replied Simmias.
And what is purification but the separation of the soul from the body, as I was saying before; the habit of the soul gathering and collecting herself into herself, out of all the courses of the body; the dwelling in her own place alone, as in another life, so also in this, as far as she can; the release of the soul from the chains of the body?
Very true, he said.
And what is that which is termed death, but this very separation and release of the soul from the body?
Simply speaking, according to an Aristotelian philosophy, this argument fails; for man is a creature composed of both body and soul, whereas Plato regards man as a soul encaged within a body. Consequently, Plato holds that man cannot have speculative knowledge unless he divorces himself from the body, which is otherwise an obstacle to the acquisition of this knowledge. The Aristotelian, on the contrary, recognizes that man cannot exercise philosophy or even have any kind of speculative knowledge without the aid of the body; for the agent intellect must abstract from the phantasm in the imagination, which in turn only exists because of the senses themselves.
That being said, I do think there is a way in which a Thomist theologian - who is also an Aristotelian philosopher - may elevate Plato's idea to a conformity with Christian theology. In this life, the Thomist says, natural knowledge can only be attained with the aid of the bodily senses. But due to fallen human nature, the body has also become a burden and a hindrance. The flesh rebels against the spirit, influences it, sometimes deadens it. Consequently, in order to rise to perfect contemplation of the truth - the divine truth - one must first prepare oneself by rising above the senses, mortifying the body, checking the bodily passions, etc. This is necessary until death, after which - hopefully - the harmony of the human person will be restored, and the soul will rest in the vision of the divine essence, and the body will enjoy the fullness of its own perfection. For the Christian, death is desirable not for its own sake, but only because it is a necessary step to a fuller life.