'First' in the Bible

which has come to you. Indeed, just as in the whole world the gospel is constantly bearing fruit and spreading [by God’s power], just as it has been doing among you ever since the day you first heard of it and understood the grace of God in truth [becoming thoroughly and deeply acquainted with it].

He is also the head [the life-source and leader] of the body, the church; and He is the beginning, the firstborn from the dead, so that He Himself will occupy the first place [He will stand supreme and be preeminent] in everything.