That is contained in the clauses from the middle of the fifth verse to the end of the sixth, and is introduced with significant abruptness, immediately after the commendation of the Colossians' faith. The Apostle's mind and heart are so full of the dangers which he saw them to be in, although they did not know it, that he cannot refrain from setting forth an impressive array of considerations, each of which should make them hold to the gospel with an iron grasp. They are put with the utmost compression. Each word almost might be beaten out into a long discourse, so that we can only indicate the lines of thought. This somewhat tangled skein may, on the whole, be taken as the answer to the question, Why should we cleave to Paul's gospel, and dread and war against tendencies of opinion that would rob us of it? They are preliminary considerations adapted to prepare the way for a patient and thoughtful reception of the arguments which are to follow, by showing how much is at stake, and how the readers would be poor indeed if they were robbed of that great Word. He begins by reminding them that to that gospel they owed all _their knowledge and hope of heaven_--the hope "whereof ye heard before in the word of the truth of the gospel." That great word alone gives light on the darkness. The sole certainty of a life beyond the grave is built on the Resurrection of Jesus Christ, and the sole hope of a blessed life beyond the grave for the poor soul that has learned its sinfulness is built on the Death of Christ. Without this light, that land is a land of darkness, lighted only by glimmering sparks of conjectures and peradventures. So it is to-day, as it was then; the centuries have only made more clear the entire dependence of the living conviction of immortality on the acceptance of Paul's gospel, "how that Christ died for our sins according to the Scriptures, and that He was raised again the third day." All around us, we see those who reject the fact of Christ's resurrection finding themselves forced to surrender their faith in any life beyond. They cannot sustain themselves on that height of conviction, unless they lean on Christ. The black mountain wall that rings us poor mortals round about is cloven in one place only. Through one narrow cleft there comes a gleam of light. There and there only is the frowning barrier passable. Through that grim cañon, narrow and black, where there is only room for the dark river to run, bright-eyed Hope may travel, letting our her golden thread as she goes, to guide us. Christ has cloven the rock, "the Breaker has gone up before" us, and by His resurrection alone we have the knowledge which is certitude, and the hope which is confidence, of an inheritance in light. If Paul's gospel goes, that goes like morning mist. Before you throw away the "word of the truth of the gospel," at all events understand that you fling away all assurance of a future life along with it.