So it is that the Gospel has to do with eternal things, but eternal things in the present time. The trouble with people is that they regard eternity as only future, whereas eternity is past, present, and future. It has been, is, and is to be.
God is calling the minds of men back to the beginning. He is calling for a return to the Sabbath of the Lord, which a church, spoiled through philosophy and vain deceit, thought to do away with and replace by a day of its own appointment.