'Beginning' in the Bible

as those who from the beginning were eye-witnesses of and attendants on the Word have delivered them to us,

And Jesus himself was beginning to be about thirty years old; being as was supposed son of Joseph; of Eli,

But they insisted, saying, He stirs up the people, teaching throughout all Judaea, beginning from Galilee even on to here.

and that repentance and remission of sins should be preached in his name to all the nations beginning at Jerusalem.