Decisions of faith aren't spontaneous.Decisions aren't spontaneous; correct. So what are they? Causal.
The woman with the issue of blood say "If I but touch the hem of his garment, I shall be healed". It was a decision!
If faith is done by God then He messed up with Peter but Jesus gave the correct understanding.
If it is only God and Peter began to sink then God messed up! But Jesus said "Peter, why did YOU doubt"... free will.
God wanted Israel to go to the promised land. The first group's free will prevented it with only Joshua and Caleb having a spirit of faith. God's word was still accomplished... but it the second generation.Where does the word of God originate? And according to Isaiah, God's word does not return unaccomplished.
What you're referring to is autolatry.