'From the Beginning' in the Bible

Who acts and carries out decrees? Who summons the successive generations from the beginning? I, the Lord, am present at the very beginning, and at the very end -- I am the one.

Who decreed this from the beginning, so we could know? Who announced it ahead of time, so we could say, 'He's correct'? Indeed, none of them decreed it! Indeed, none of them announced it! Indeed, no one heard you say anything!

who announces the end from the beginning and reveals beforehand what has not yet occurred, who says, 'My plan will be realized, I will accomplish what I desire,'