“Take heed, brethren, lest there be in any of you an evil heart of unbelief,
in departing from the living God.”
(Hebrews 3:12)
Christians, saved by grace through faith in Jesus Christ, are not immune to the danger of straying from God. Indeed, some professing believers mistakenly assume that God’s grace permits unchecked sin, believing their standing with Him remains secure regardless of their actions. This error, rooted in the heresy of the Libertines, misinterprets God’s unmerited grace as a license to sin, falsely claiming that more sin magnifies God’s forgiveness. Yet Scripture refutes this: “Shall we continue in sin, that grace may abound? God forbid” (Rom. 6:1-2; Titus 2:12-13). Hebrews, a covenant book, warns that God blesses obedience to His terms but curses disobedience (Heb. 2:1-3, 3:12, 6:5-6, 10:26-31), warning against the seriousness of departing from Him.
Moreover, apostasy reveals a heart never truly rooted in faith. As 1 John 2:19 explains, “They went out from us, but they were not of us; for if they had been of us, they would no doubt have continued with us.” Judas, despite walking with Christ and witnessing miracles, betrayed Him for money, exposing his unbelieving heart (John 13:2; Matt. 10:1-4). Those who profess faith while disregarding God’s commands align with another god, not the God of Scripture. Christ calls such people “slow to believe,” and Paul describes them as blinded by “the god of this world” (2 Cor. 4:4).
Departing from God manifests in wayward affections, false doctrine, corrupt worship, rejection of Scripture, and sinful living (1 Kings 11:9; Gal. 5:4; Matt. 10:33; Prov. 2:13). As Thomas Wilson notes, “The one who is a backslider in heart is averse in his heart and turns his heart back or away from wisdom [when] God’s summons.”[1]
God’s covenant ensures that true believers will not ultimately fall away (Ps. 37:24; John 10:27-29; 1 Pet. 1:1, 5). Yet, the warning against an “evil heart of unbelief” calls us to vigilance, guarding against doubt and rebellion that lead to apostasy. True faith is evidenced by obedience, as James declares. What we do, not just what we say, is the fruit that verifies our profession of faith in Christ (James 2:1ff).
Contemplations:
- Unbelief, the root of apostasy. It is easy to see, Lord, that unbelief is at the root of apostasy. An evil heart of unbelief departs from the Living God, and such unbelief virtually includes all other sins. As faith is the chiefest among graces, so unbelief is the chiefest among sins. Help me guard against unbelief as I cling to Your truth.
- Duties of holiness. Lord, when I consider what I ought to be doing as a participating believer in Your wonderful covenant of grace, I see that I should diligently attend to the secret duties of holiness, serious meditation on God and His word and works, my own sin, redemption, duty, death, judgment, and the endless joy or torment afterward. I should regularly and diligently examine my heart and take inventory of my thoughts, affections, words, and actions. I need to be mortifying my sins, especially those sins of unbelief, error, hardness of heart, pride, worldliness, sensuality, and hypocrisy as well as see that I actively exercise all graces and resist temptation.
- Defining departure. What does it mean to depart from You, Lord? I understand that it includes consenting to sin and being deceived by its temptation. It is defined by a hardness of heart, unbelief, and a practice of calling the truth of the Gospel into question. An evil heart leads to apostasy and falling from God, extinguishing the light of the Gospel in them. This is a dangerous state indeed. Keep me from such a path, Lord.
- The evil heart’s danger. A wicked heart is a great evil—an inveterate and insensible evil. It is the root of other evils and makes a man unfit to live or die. Guard my heart from this danger, Lord, and root me in Your grace.
Prayer (Supplication)
O holy and covenant-keeping God, You are the fountain of all grace, whose faithfulness secures Your people in Your love. Your warnings in Hebrews call us to cling to You, revealing Your justice against unbelief and Your mercy toward those who trust in Christ. I worship You for Your unyielding commitment to Your covenant, ensuring that those who are truly Yours will never be lost. Your glory shines in Your Son, who paid the price for my redemption, and I stand in awe of Your unchanging love.
I confess that my heart has often harbored unbelief, flirting with the temptation to depart from You. I have taken Your grace lightly, at times living as if my actions do not affect my standing with You. I have neglected the duties of holiness, failing to examine my heart or mortify sins like pride and worldliness. My faith has wavered, doubting Your promises and leaning on my own understanding. Forgive me for these sins, for allowing an evil heart of unbelief to take root. Cleanse me through Jesus’ blood, restoring my heart to fervent devotion.
Lord, I plead for Your grace to keep me steadfast in Your covenant. Guard my heart against unbelief, rooting me in the truth of Your Word, as Hebrews 3:12 warns. Help me diligently pursue holiness, meditating on Your works and examining my thoughts and actions daily. Strengthen me to resist temptation and diligently work to mortify those sins that lead to apostasy.
Fill me with Your Spirit, that I may exercise faith, hope, and love, as James 2 urges, proving my profession through obedience. And conform me to Christ’s image, that my life may glorify You.
In Jesus’ name I pray, Amen.
Further References for Hebrews 3:12:
Hebrews 4:11; 2 Peter 3:17; Jer. 3:17; John 8:24.
[1] Thomas Wilson, A Complete Christian Dictionary, (London: E. Cotes, 1661), 40.
