For we must be ever pressing onward that we may reach the end of each difficult undertaking by successive increases of the commandments of God, and so to the completion of the divine work. For neither is one stone the whole fabric of the tower, nor does a single command lead to the perfection of the soul. But we must lay the foundation, and according to the Apostle, thereupon must be placed store of gold, silver, and precious stones. (1 Cor. 3:12.) Whence it is added, Lest haply after he hath laid the foundation, &c.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: lib. de Virg. 17.