This passage is taken from St. Therese's autobiography. I find what she writes here to be quite encouraging. It serves as a reminder that we who are spiritually weak can still make use of our weakness, in order to become saints.
[I]t has ever been my desire to become a Saint, but I have always felt, in comparing myself with the Saints, that I am as far removed from them as the grain of sand, which the passer-by tramples underfoot, is remote from the mountain whose summit is lost in the clouds. Instead of being discouraged, I concluded that God would not inspire desires which could not be realized, and that I may aspire to sanctity in spite of my littleness. For me to become great is impossible, I must bear with myself and my many imperfections; but I will seek out a means of getting to Heaven by a little way—very short and very straight, a little way that is wholly new. We live in an age of inventions; nowadays the rich need not trouble to climb the stairs, they have lifts instead. Well, I mean to try and find a lift by which I may be raised unto God, for I am too tiny to climb the steep stairway of perfection. I have sought to find in Holy Scripture some suggestion as to what this lift might be, which I so much desired, and I read these words uttered by the Eternal Wisdom Itself: “Whosoever is a little one, let him come to Me.” (Proverbs 9:4). Then I drew near to God, feeling sure that I had discovered what I sought; but wishing to know further what He would do to the little one, I continued my search and this is what I found: “You shall be carried at the breasts and upon the knees; as one whom the mother caresses, so will I comfort you.” (cf. Isaiah 66:12-13).
Never have I been consoled by words more tender and sweet. Thine Arms, then, O Jesus, are the lift which must raise me up even unto Heaven. To get there I need not grow; on the contrary, I must remain little, I must become still less. O my God, Thou hast gone beyond my expectation, and I... “I will sing Thy mercies! Thou hast taught me, O Lord, from my youth and till now I have declared Thy wonderful works, and thus unto old age and gray hairs.” (cf. Psalms 71:16-18).