'Of the World' in the Bible

We who have believed are soon to be admitted to the true rest; as He has said, "As I swore in My anger, they shall not be admitted to My rest," although God's works had been going on ever since the creation of the world.

In that case Christ would have needed to suffer many times, from the creation of the world onwards; but as a matter of fact He has appeared once for all, at the Close of the Ages, in order to do away with sin by the sacrifice of Himself.