John 20:28

And Thomas answered and said unto him
Without examining his hands and side, and as astonished at his condescension and grace, and ashamed of his unbelief:

my Lord and my God;
he owns him to be Lord, as he was both by creation and redemption; and God, of which he was fully assured from his omniscience, which he had given a full proof of, and from the power that went along with his words to his heart, and from a full conviction he now had of his resurrection from the dead. He asserts his interest in him as his Lord and his God; which denotes his subjection to him, his affection for him, and faith in him; so the divine word is called in Philo the Jew, (kuriov mou) , "my Lord" ^F24.