Why did Jesus suffer and die on the cross?
Jesus suffered and died on the cross because He was ready to pour out salvation to the whole human race. Though He could have destroyed His enemies, He voluntarily subjected Himself to sinful men, permitting them to nail Him to a Roman cross. His suffering and death were an act of grace, undeserved by humanity.
Les teaches that the God of creation Himself, the invisible triune God, had one of the persons of that triune God step out and take on human flesh. He walked among sinful men, subjected Himself to the desires of sinful men, and let them nail Him to a Roman cross. He permitted it. He could have zapped the whole Roman empire with one word if He had wanted to, but of His own volition He subjected Himself to those people who put Him on a cross where He suffered and died. Les explains this was simply because He was ready now to pour out salvation to the whole human race. That is grace. Les then extends the same principle: everything we enjoy, every breath of air, every bite of food, every good thing, is grace. We do not deserve it.