Calvin notes that the command and the promise of God are in conflict. The promise is that God will fulfill his destiny of a large nation through Isaac. The command is that this son must be killed. The underlying message is that God is God and this seems to be what Abraham gives himself to. Luther is right to say that no human reason or philosophy comprehends these two marks of God.
Faith is the readiness to answer 'Yes' to the command and 'Yes' to the provision.
This brings us to the great word of challenge in this text for you and me. Faith is nothing other than trust in the power of the resurrection against every deathly circumstance . It is the God who surprises us with life in the midst of death who can be trusted. Resurrection concerns the keeping of a promise when there is no ground for it. Paul's turn on the text may be I Corinthians.