Self-Determinism In The Dock

Is there not a point at which we must stop making excuses for ignoring God and no longer blame the other person for our behavior?  When Sarah lashed out at her husband Abraham for merely doing what she told him to do, God took the matter out of her hands and put things squarely in Abraham's grip.  The son Ishmael was conceived because Sarah demanded it; then when he was there Sarah hated Abraham for the part he played in the boy's presence.  Why is it that God spoke directly to Abraham and bypassed Sarah altogether in the sacrifice of Isaac?  Why did Abraham not take Sarah with him on the terrible duty up the mountain?  Perhaps it is because Sarah lost her way in not accepting the part she played in the denial of the Lord's providential leadership with regard to the building of her family?  In the end it was Abraham that had to get the job done, who had to wield the knife and raise it in faith.  One might wonder which was the worst, bringing the boy or having to watch him leave.  Yet in the end, each of them, at the previous point of rebellion, had to believe God all the way out to where self-ambition faded into complete faith in God and His way.  Sarah had to trust in Abraham to hear from God clearly and Abraham had to trust what he heard from the Lord and not slide out from under it.  No more passing the buck, no more waffling when God spoke.  It is allegiance to God only that we all must eventually determine for ourselves.         Then Sarai said to Abram, "You are responsible for the wrong I am suffering, I put my servant in your arms, and now that she knows she is pregnant, she despises me.  May the Lord judge between you and me."  Genesis 16: 5