Genesis 22:8 And Abraham said, My son, God will provide himself a lamb for a burnt offering: so they went both of them together.
Abraham is going up the hill to sacrifice his son. He, however, knows that God is going to provide the sacrifice. He knows based on God’s promise that Isaac will live. He doesn’t know how he just knows.
The truth is that we must step out by faith when we do not know what is going to happen or how it will happen. We have to just honor God and let Him do in and through us what will bring Him honor and glory.
The beautiful picture here is that of the substitute. Isaac only died in a picture. The ram took his place. We deserve death and hell. We only die in a picture because Jesus takes our place.
It is God that provides the sacrifice and that sacrifice is He.