Augustine of Hippo

"Go back, therefore, to the heart," and if you are believers, you will find Christ there. He himself is speaking to you there. Yes, here am I, shouting my head off—but he, in silence, is doing more teaching. I am speaking by the sound of these words; he is speaking inwardly by the awe you feel in your thoughts.

Sermon 102:2 ↗

Jerome

Remember this, and be established, and return, you transgressors, to the heart. Recall the former age, for I am God, and there is no other God, nor is there anyone like me. I declare the end from the beginning, and from long ago the things that have not yet been done, saying: My purpose will stand, and I will accomplish all my desire. I call a bird of prey from the east, and from a far country a man of my counsel; I have spoken, and I will bring it to pass; I have planned it, and I will do it. …

Commentary on Isaiah ↗

Thomas Aquinas

Third, he concludes the calling back: remember this, what I have said of my love and the worthlessness of idols. Man ought to return to the heart, as to the throne of a judge, that he might examine himself: I meditated in the night with my own heart: and I was exercised and I swept my spirit (Ps 77:6); as to the principle of life, that he might guard himself: with all watchfulness keep your heart, because life issues out from it (Prov 4:23); as to an audience hall of divine speech, that he might listen diligently: I will lead her …

Commentary on Isaiah ↗