Colossians 1:5-6

because of the [confident] hope [of experiencing that] which is reserved and waiting for you in heaven. You previously heard of this hope in the message of truth, the gospel [regarding salvation] 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].