'Event' in the Bible

Listen very carefully, I tell you a mystery [a secret truth decreed by God and previously hidden, but now revealed]; we will not all sleep [in death], but we will all be [completely] changed [wondrously transformed],

And the holy Writings, seeing before the event that God would give the Gentiles righteousness by faith, gave the good news before to Abraham, saying, In you will all the nations have a blessing.