3:19 So we see that they could not enter in because of unbelief. It was unbelief that kept them out of Canaan. Hence, the lesson which is given more fully in the next chapter. These warnings show us that the Hebrew Christians addressed were subjected to trials, and some of them in danger of apostasy, falling away through unbelief. Hence, the fate of Israel in the wilderness is pointed out. If unbelief shut out the Israelites from the rest in Canaan, unbelief will shut the gates of heavenly rest to those who have started on the way.
3:19 So we see they could not enter in - Though afterward they desired it.
3:14-19 The saints' privilege is, they are made partakers of Christ, that is, of the Spirit, the nature, graces, righteousness, and life of Christ; they are interested in all Christ is, in all he has done, or will do. The same spirit with which Christians set out in the ways of God, they should maintain unto the end. Perseverance in faith is the best evidence of the sincerity of our faith. Hearing the word often is a means of salvation, yet, if not hearkened to, it will expose more to the Divine wrath. The happiness of being partakers of Christ and his complete salvation, and the fear of God's wrath and eternal misery, should stir us up to persevere in the life of obedient faith. Let us beware of trusting to outward privileges or professions, and pray to be numbered with the true believers who enter heaven, when all others fail because of unbelief. As our obedience follows according to the power of our faith, so our sins and want of care are according to the prevailing of unbelief in us.
