Why would G-d sacrifice HIMSELF but tell HIMSELF that he would have to die for the world?

God the father keeps all real power in his own hands. Jesus had to give up his heavenly being to be a human being and be a sacrifice for all men's sins who ask. On their own account, only Enoch and Elijah had made it to heaven; nope, not even Abraham, Moses, et. al. We need help. We have help.