For this reason, then, we require greater attention and consideration in order to investigate how precisely we ought to live, and what is the true piety. For it is plain that, from the very reason that truth is difficult and arduous of attainment, questions arise from which spring the heresies, savouring of self-love and vanity, of those who have not learned or apprehended truly, but only caught up a mere conceit of knowledge. With the greater care, therefore, are we to examine the real truth, which alone has for its object the true God. And the toil is followed by sweet discovery and reminiscence.