Nicene and Post Nicene-Fathers, Vol. I:
The Confessions: Chapter XV

Chapter XV.—He Entreats God, that Whatever Useful Things He Learned as a Boy May Be Dedicated to Him.

24. Hear my prayer, O Lord; let not my soul faint under Thy discipline, nor let me faint in confessing unto Thee Thy mercies, whereby Thou hast saved me from all my most mischievous ways, that Thou mightest become sweet to me beyond all the seductions which I used to follow; and that I may love Thee entirely, and grasp Thy hand with my whole heart, and that Thou mayest deliver me from every temptation, even unto the end. For lo, O Lord, my King and my God, for Thy service be whatever useful thing I learnt as a boy—for Thy service what I speak, and write, and count. For when I learned vain things, Thou didst grant me Thy discipline; and my sin in taking delight in those vanities, Thou hast forgiven me. I learned, indeed, in them many useful words; but these may be learned in things not vain, and that is the safe way for youths to walk in.