'Gave Himself' in the Bible

Now for some time a man named Simon had been practicing sorcery in that city, and had amazed the people of Samaria. He gave himself out to be some great person.

And when Silas and Timothy came from Macedonia, Paul gave himself wholly to preaching the word, testifying to the Jews Christ Jesus.

This man had been trained in the way of the Lord; and burning in spirit, he gave himself up to teaching the facts about Jesus, though he had knowledge only of John's baptism: