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Guarding the Heart from Deception and Sinfulness

The concept of guarding the heart in biblical thought emphasizes the heart as the core of human existence, from which all actions and intentions flow [8]. This idea is encapsulated in Proverbs 4:23, which states that "issues of life are out of" the heart [7]. The biblical understanding of the heart encompasses not only spiritual activity but also all operations of human life, including wisdom, purity, uprightness, and piety [8].

The necessity of guarding the heart arises from its inherent susceptibility to deception and sinfulness. Jeremiah 17:9 declares, "The heart is deceitful above all things, and it is exceedingly corrupt: who can know it?" [5]. This deceitfulness is a characteristic of the heart itself [9] and is the source from which evil thoughts, murders, adulteries, sexual sins, thefts, false testimony, and blasphemies emerge [2, 10]. The unrenewed heart's imaginations are described as sinful [10]. This inherent sinfulness is understood to be present from birth, though the wicked indulge it while the godly strive against it [13].

Deception is a significant threat to the heart. Deuteronomy 11:16 warns, "Be careful, lest your heart be deceived, and you turn aside, and serve other gods, and worship them" [3]. Deceit is characterized as falsehood [9] and can lead individuals away from God. The first sin, for instance, involved being "beguiled—cajoled by flattering lies" [14]. Therefore, believers are exhorted to ensure their love is "without deceit" [4].

Guarding the heart involves active diligence and intentional effort. John Gill, in his commentary on Proverbs 4:23, explains that "keeping the heart with all diligence" means protecting the mind from vanity, the understanding from error, the will from perverseness, the conscience from guilt, and the affections from being inordinate or set on evil objects [15]. This diligence is crucial because the heart is naturally "so deceitful and treacherous" [15]. It requires watching all avenues to the heart to prevent harmful influences from entering and evil from emerging [15].

The New Testament further emphasizes the importance of a pure heart. Paul speaks of "keeping the secret of the faith in a heart free from sin" (1 Timothy 3:9 BBE) [1]. Believers are called to "cleanse ourselves from all filthiness of the flesh and spirit, perfecting holiness in the fear of God" (2 Corinthians 7:1 KJV) [6]. This cleansing involves actively hating what is evil and fixing one's mind on what is good [4]. The renewed heart is characterized by a desire to seek God, being fixed on Him, and being joyful in Him [12]. It is described as perfect with God, upright, clean, pure, tender, single, sincere, honest, good, broken, contrite, and obedient [12]. Such a heart is filled with God's law and fear, and it meditates on His word [12].

The concept of guarding the heart is closely linked to heedfulness, which is commanded throughout scripture [11]. This includes being careful in the care of the soul, in worship, in what is heard, and in conduct [11]. It also involves guarding against sin, unbelief, idolatry, and false teachers [11]. The "heart" and "soul" are sometimes used interchangeably in scripture, but the heart is specifically identified as the "home of the personal life" [8]. The protection of the heart is seen as vital, akin to a breastplate defending a vital organ, ensuring that with a "head and heart right, the whole man is right" [16].

Sources

  1. I Timothy “I Timothy 3:9 (BBE) — Keeping the secret of the faith in a heart free from sin.”
  2. Matthew “For out of the heart come evil thoughts, murders, adulteries, sexual sins, thefts, false testimony, and blasphemies. -- Matthew 15:19”
  3. Deuteronomy “Be careful, lest your heart be deceived, and you turn aside, and serve other gods, and worship them; -- Deuteronomy 11:16”
  4. Romans “Romans 12:9 (BBE) — Let love be without deceit. Be haters of what is evil; keep your minds fixed on what is good.”
  5. Jeremiah “The heart is deceitful above all things, and it is exceedingly corrupt: who can know it? -- Jeremiah 17:9”
  6. King James Version “[KJV] 2 Corinthians 7:1 — Having therefore these promises, dearly beloved, let us cleanse ourselves from all filthiness of the flesh and spirit, perfecting holiness in the fear of God.”
  7. Torrey's Topical Textbook “Torrey's Topical Textbook: Heart, The — Issues of life are out of -- Pr 4:23. God Tries. -- 1Ch 29:17; Jer 12:3. Knows. -- Ps 44:21; Jer 20:12. Searched. -- 1Ch 28:9; Jer 17:10. Understands the thoughts of. -- 1Ch 28:9; Ps 139:2. Ponders. -- Pr 21:2; 24:12. Influences. -- 1Sa 10:26; Ezr 6:22; 7:27; Pr 21:1; Jer 20:9. Creates a new. -- Ps 51:10; Eze 36:26. Prepares. -- 1Ch 29:18; Pr 16:1. Opens. -- Ac 16:14. Enlightens. -- 2Co 4:6; Eph 1:18. Strengthens. -- Ps 27:14. Establishes. -- Ps 112:8; 1Th 3:13. Should be Prepared to God. -- 1Sa 7:3. Given to God. -- Pr 23:26. Perfect with God. -- 1Ki 8:”
  8. Easton's Bible Dictionary “Easton's Bible Dictionary: Heart — According to the Bible, the heart is the centre not only of spiritual activity, but of all the operations of human life. "Heart" and "soul" are often used interchangeably (Deut. 6:5; 26:16; comp. Matt. 22:37; Mark 12:30, 33), but this is not generally the case. The heart is the "home of the personal life," and hence a man is designated, according to his heart, wise (1 Kings 3:12, etc.), pure (Ps. 24:4; Matt. 5:8, etc.), upright and righteous (Gen. 20:5, 6; Ps. 11:2; 78:72), pious and good (Luke 8:15), etc. In these and such passages the word "soul" could not ”
  9. Torrey's Topical Textbook “Torrey's Topical Textbook: Deceit — Is falsehood -- Ps 119:118. The tongue, the instrument of -- Ro 3:13. Comes from the heart -- Mr 7:22. Characteristic of the heart -- Jer 17:9. God abhors -- Ps 5:6. Forbidden -- Pr 24:28; 1Pe 3:10. Christ was perfectly free from -- Isa 53:9; 1Pe 2:22. Saints Free from. -- Ps 24:4; Zep 3:13; Re 14:5. Purposed against. -- Job 27:4. Avoid. -- Job 31:5. Shun those addicted to. -- Ps 101:7. Pray for deliverance from those who use. -- Ps 43:1; 120:2. Delivered from those who use. -- Ps 72:14. Should beware of those who teach. -- Eph 5:6; Col 2:8. Should lay aside”
  10. Torrey's Topical Textbook “Torrey's Topical Textbook: Sin — Is the transgression of the law -- 1Jo 3:4. Is of the devil -- 1Jo 3:8; Joh 8:44. All unrighteousness is -- 1Jo 5:17. Omission of what we know to be good is -- Jas 4:17. Whatever is not of faith is -- Ro 14:23. The thought of foolishness is -- Pr 24:9. All the imaginations of the unrenewed heart are -- Ge 6:5; 8:21. Described as Coming from the heart. -- Mt 15:19. The fruit of lust. -- Jas 1:15. The sting of death. -- 1Co 15:56. Rebellion against God. -- De 9:7; Jos 1:18. Works of darkness. -- Eph 5:11. Dead works. -- Heb 6:1; 9:14. The abominable thing that Go”
  11. Torrey's Topical Textbook “Torrey's Topical Textbook: Heedfulness — Commanded -- Ex 23:13; Pr 4:25-27. Necessary In the care of the soul. -- De 4:9. In the house and worship of God. -- Ec 5:1. In what we hear. -- Mr 4:24. In how we hear. -- Lu 8:18. In keeping God's commandments. -- Jos 22:5. In conduct. -- Eph 5:15. In speech. -- Pr 13:3; Jas 1:19. In worldly company. -- Ps 39:1; Col 4:5. In giving judgment. -- 1Ch 19:6,7. Against sin. -- Heb 12:15,16. Against unbelief. -- Heb 3:12. Against idolatry. -- De 4:15,16. Against false Christs, and false prophets. -- Mt 24:4,5,23,24. Against false teachers. -- Phm 3:2; Col 2:”
  12. Torrey's Topical Textbook “Torrey's Topical Textbook: Heart, Character of the Renewed — Prepared to seek God -- 2Ch 19:3; Ezr 7:10; Ps 10:17. Fixed on God -- Ps 57:7; 112:7. Joyful in God -- 1Sa 2:1; Zec 10:7. Perfect with God -- 1Ki 8:61; Ps 101:2. Upright -- Ps 97:11; 125:4. Clean -- Ps 73:1. Pure -- Ps 24:4; Mt 5:8. Tender -- 1Sa 24:5; 2Ki 22:19. Single and sincere -- Ac 2:46; Heb 10:22. Honest and good -- Lu 8:15. Broken, contrite -- Ps 34:18; 51:17. Obedient -- Ps 119:112; Ro 6:17. Filled with the law of God -- Ps 40:8; 119:11. Awed by the word of God -- Ps 119:161. Filled with the fear of God -- Jer 32:40. Meditat”
  13. Psalms (Protestant academic) “Tyndale House on Psalms 58:3: 58:3 All human beings are born sinners (see 51:5); however, whereas the wicked indulge their sinful nature, the godly fight against it (Rom 7:19-23; Jas 4:1-10).”
  14. Genesis (Presbyterian) “Jamieson, Fausset & Brown on Genesis 3:13: beguiled--cajoled by flattering lies. This sin of the first pair was heinous and aggravated--it was not simply eating an apple, but a love of self, dishonor to God, ingratitude to a benefactor, disobedience to the best of Masters--a preference of the creature to the Creator.”
  15. Proverbs (Baptist/Reformed) “John Gill on Proverbs 4:23: Keep thy heart with all diligence,.... The mind from vanity, the understanding from error, the will from perverseness, the conscience clear of guilt, the affections from being inordinate and set on evil objects, the thoughts from being employed on bad subjects; and the whole from falling into the hands of the enemy, or being the possession of Satan: great diligence had need be used in keeping it, since it is naturally so deceitful and treacherous; a strict eye is to be kept upon it; all the avenues to it to be watched, that nothing hurtful enters, or evil comes out;”
  16. 1 Thessalonians (Presbyterian) “Jamieson, Fausset & Brown on 1 Thessalonians 5:8: Faith, hope, and love, are the three pre-eminent graces (Th1 1:3; Co1 13:13). We must not only be awake and sober, but also armed; not only watchful, but also guarded. The armor here is only defensive; in Eph 6:13-17, also offensive. Here, therefore, the reference is to the Christian means of being guarded against being surprised by the day of the Lord as a thief in the night. The helmet and breastplate defend the two vital parts, the head and the heart respectively. "With head and heart right, the whole man is right" [EDMUNDS]. The head needs ”
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