On Vigilance as to a Heart of Unbelief
Hebrews 3:12
Take heed, brothers, lest there be in any of you an evil heart of unbelief, in departing from the living God.


1. This exhortation by no means implies that it is either in our will or in our power to change our hearts. For, although it is otherwise with respect to conversion, regeneration is everywhere represented as a real change affected on the heart of the sinner, wherein he is entirely passive, as a new creation, a calling of things that be not, a quickening of those who are dead, a transformation into the image of God; in a word, as a work of such a nature, that it requires an exceeding greatness of Divine power.

2. This exhortation implies that we are in great danger of being negligent. The power of sin in our hearts, the temptations of Satan, and the influence of the world, are all evidences of the danger we are in of rejecting Christ.

3. It implies the necessity of watchfulness and jealousy of ourselves. Take heed, look around you, lest ye be misled as to the great interests of salvation. We are called to such vigilance as become a watchman appointed for the very purpose of observing the motions of an enemy.

4. These words denote the necessity of knowing our natural state as under the dominion of sin. It is not said, Take heed "lest there enter into your hearts any motion of unbelief," as if it were a thing that had no root within us, a habit to be contracted by imitation, or by a course of iniquity. But, take heed lest there be in any of you a heart of unbelief; as plainly declaring that this is natural to every man, and that it is so as denominating his whole heart.

5. It implies the possibility of knowing our present state.

6. It expresses the necessity and importance of the knowledge of our state. Were not this knowledge of the greatest consequence to us, the Holy Spirit would not press us so earnestly to take heed that we deceive not ourselves. The importance of this knowledge appears from that of its subject; as the glory of God and our eternal comfort are inseparably connected with it. On this question, whether we be in Christ? depends another of the greatest moment, whether God's highest end, not only in the works of creation and providence, but in redemption, and the highest end of our being be accomplished? This is the one thing needful, compared with which everything else that requires our attention is less than nothing and vanity.

7. It implies that it is highly incumbent on us to examine ourselves for discovering our state. The phrase here used signifies a looking not only about us but into ourselves, a trying of our own hearts: for thus alone can we discover the dominion or prevalence of unbelief.

8. This injunction declares the necessity of a diligent use and improvement of all the means of grace. We are not to confine our attention merely to what passes within us for attaining a knowledge of our state, but diligently to attend to ordinances as the means instituted by God for rectifying our state, if it be bad, and for giving us a greater degree of certainty.

9. It implies that Christians ought not only to know their real state but to attend to their present exercise.

10. This injunction further implies that the sin of believers, in itself considered, hath no less guilt, and is attended with no less danger than that of the unregenerate.

11. It also implies that our preservation in a state of grace is inseparably connected with the use of means on our part.From the foregoing observations, those who are still negligent about the state of their hearts may be exhorted —

1. To the exercise of self-examination.

2. Beware of spiritual sloth. This is the ruin of many hearers of the gospel. They will not give themselves so much trouble as to make a diligent inquiry into their state for eternity.

3. Earnestly apply to God Himself that He may open and incline your hearts. He alone can perform this work. It is His prerogative. It is entirely a supernatural work. It is not bestowed on men like any natural gift, such as wisdom or prudence. It must be communicated by the effectual operation of the spirit, implanting a new nature. For God saith, "Behold I make all things new."

(John Jamieson, M. A.)



Parallel Verses
KJV: Take heed, brethren, lest there be in any of you an evil heart of unbelief, in departing from the living God.

WEB: Beware, brothers, lest perhaps there be in any one of you an evil heart of unbelief, in falling away from the living God;




On the Tendency of Unbelief
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