'Necessary' in the Bible

"Brethren, it was necessary that the Scripture should be fulfilled--the prediction, I mean, which the Holy Spirit uttered by the lips of David, about Judas, who acted as guide to those who arrested Jesus.

"It is necessary, therefore, that of the men who have been with us all the time that the Lord Jesus went in and out among us--

For it has seemed good to the Holy Spirit and to us to lay upon you no burden heavier than these necessary requirements--

which he clearly explained, pointing out that it had been necessary for the Christ to suffer and rise again from the dead, and insisting, "The Jesus whom I am announcing to you is the Christ."