But when the Apostle says, Faith is the substance of things hoped for, the evidence of things not seen, (Heb. 11:1) it is plain that things which are seen, are objects not of faith, but of knowledge. Why then is it said to Thomas who saw and touched, Because thou hast seen Me, thou hast believed? Because he saw one thing, believed another; saw the man, confessed the God. But what follows is very gladdening; Blessed are they that have not seen, and yet have believed. In which sentence we are specially included, who have not seen Him with the eye, but retain Him in the mind, provided we only develope our faith in good works. For he only really believes, who practises what he believes.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: Hom. xxvi.