Clement of Alexandria

And if one say that it is written, "There is nothing secret which shall not be revealed, nor hidden which shall not be disclosed," let him also hear from us, that to him who hears secretly, even what is secret shall be manifested. This is what was predicted by this oracle. And to him who is able secretly to observe what is delivered to him, that which is veiled shall be disclosed as truth; and what is hidden to the many, shall appear manifest to the few. For why do not all know the truth? …

The Stromata Book 1 ↗

Bede

For there is nothing hidden that will not be revealed, and nothing concealed that will not be known and come to light. Do not (he says) be ashamed of the Gospel of God, but among the darkness of persecutors, lift the light of the word above the lampstand of your body, retaining with a steadfast mind that day of final retribution, when God will bring to light the hidden things of darkness and will reveal the thoughts of hearts (1 Cor. IV). …

On the Gospel of Luke ↗

Bonaventure

For nothing is hidden. Here secondly he invites them to the sharing of doctrine by the necessity of the heavenly judgment in two ways: both on account of the future manifestation of all good, and on account of the future revelation of all evil. First, therefore, as to the future manifestation of all good, it is said: For nothing is hidden, namely good, that shall not be made manifest, namely through the future judgment; whence 2 Corinthians 5: "For we must all be made manifest before the tribunal of Christ, that each one may receive …

Commentary on Luke, Chapter 8 ↗