'Believed' in the Bible

know that it is not through obedience to Law that a man can be declared free from guilt, but only through faith in Jesus Christ. We have therefore believed in Christ Jesus, for the purpose of being declared free from guilt, through faith in Christ and not through obedience to Law. For through obedience to Law no human being shall be declared free from guilt.

Answer me this one question, "Is it on the ground of your obedience to the Law that you received the Spirit, or is it because, when you heard, you believed?"

He who gives you His Spirit and works miracles among you--does He do so on the ground of your obedience to the Law, or is it the result of your having heard and believed:

even as Abraham believed God, and his faith was placed to his account as righteousness?