Abraham believes two contradictory things at once-that God will take Isaac and that he will not. Language, the medium of human communication, will not help us here. It falls outside of human logic, and therefore human inter-expressability. Note that in drawing the knife, one raises the hand while withdrawing it slightly. Abraham received the existence of Isaac because he was ready to sacrifice him.
Faith is conditioned by the prior attitude of resignation.
The infinite resignation is the last stage prior to faith, so that one who has not made this movement has no faith. In order to have faith, one must recognize the inability of reflective human consciousness to attain transcendence.