[151] But virtue is an ungrudging and most liberal feeling, so that it does not hesitate to assist another with hand and foot, as the proverb goes, and with all its power. Therefore, pouring all that she knew into the mind of the pupil as into a cistern, she went again to the well to draw water, that is to say, she went to the ever-flowing wisdom of God, that what had been already imparted might be firmly fixed in by memory, and that he might also be irrigated with the knowledge of other and newer things. For the wealth of the wisdom of God is illimitable, and as a tree which is continually putting forth new shoots after the old ones, so that it never ceases growing young again, and being in the flower of its strength.