The same came to him by night, and said to him, "Rabbi, we know that you are a teacher come from God, for no one can do these signs that you do, unless God is with him."
For no man can do the signs which thou doest, unless God be with him. It is evident, he says, that Christ has been sent by God, because God displays his power in him so illustriously, that it cannot be denied that God is with him He takes for granted that God is not accustomed to work but by his ministers, so as to seal the office which he has entrusted to them. And he had good grounds for thinking so, because God always intended that miracles should be seals of his doctrine. Justly therefore does he make God the sole Author of miracles, when he says that no man can do these signs, unless God be with him; for what he says amounts to a declaration that miracles are not performed by the arm of man, but that the power of God reigns, and is illustriously displayed in them. In a word, as miracles have a twofold advantage, to prepare the mind for faith, and, when it has been formed by the word, to confirm it still more, Nicodemus had profited aright in the former part, because by miracles he recognizes Christ as a true prophet of God. 