Hebrews 3:12-19 Three truths are brought forth out of this passage. 1- Our heart is the most important thing. 2- The Perseverance of the Saints. 3- Mutual Exhortation. It is this third point that is elaborated upon in this sermon. There are many “one another” passages in the NT that teach us our mutual responsibility one to another in the Body of Christ. This is particularly true in the local assembly of believers, the Church.