Jesus' Principle of Heart Intentions in Matthew 5:27-28
Matthew 5:27-28 stands at the center of Jesus' Sermon on the Mount, where he reinterprets the Mosaic commandment against adultery: "You have heard that it was said, 'You shall not commit adultery.' But I say to you that everyone whose eyes are turned on a woman with desire has had connection with her in his heart" [2]. This saying extends the prohibition from the physical act to the interior disposition, locating moral culpability not merely in behavior but in the intentions that precede it.
Literary Context and Structure
The passage belongs to a series of six antitheses (Matthew 5:21-48) in which Jesus contrasts traditional legal interpretation ("You have heard") with his own authoritative teaching ("But I say"). Each antithesis follows a similar pattern: citation of Torah or tradition, followed by Jesus' intensification or reorientation of the command. The adultery saying is the second antithesis, immediately following his teaching on anger and murder (5:21-26). Both sayings share a common strategy: "Jesus' righteousness uncovers sin at a deeper level than the external; he reveals the true intent of the law" [7].
The Heart as Moral Locus
Jesus' principle shifts the evaluative focus from outward conformity to inward purity. The phrase "in his heart" (Greek en tē kardia autou) designates the seat of intention, desire, and will in biblical anthropology. Proverbs observes that "the intentions of a man's heart are deep waters" [1], acknowledging the hidden complexity of human motivation. Jesus insists that these hidden waters are the true domain of righteousness. His teaching throughout the Sermon contrasts "those whose hearts are pure" with "those who thought that they had satisfied God's will through ceremonial conformity to tradition" [6]. The goal is not merely external compliance but "the love that comes from a pure heart, a clear conscience, and a sincere faith" [3].
Interpretive Implications
By equating lustful looking with adultery, Jesus does not abolish the distinction between thought and deed in legal or social terms, but he does collapse it in moral and theological terms. The man who looks with intent to possess has already violated the covenant of fidelity in the sphere where God's judgment operates—the heart. Cross-references link this teaching to Psalm 119:37 [4] and 1 John 2:16 [5], both of which address the discipline of desire and the rejection of worldly lust. Jesus' method here is consistent with his broader insistence on "simple, true heart-righteousness" over ritual observance [6], a theme that recurs in his confrontations with the Pharisees (Matthew 15:1-20; 23:25-26).
Sources
- Proverbs “Proverbs 20:5 (BSB) — The intentions of a man’s heart are deep waters, but a man of understanding draws them out.”
- Matthew “Matthew 5:28 (BBE) — But I say to you that everyone whose eyes are turned on a woman with desire has had connection with her in his heart.”
- I Timothy “I Timothy 1:5 (BSB) — The goal of our instruction is the love that comes from a pure heart, a clear conscience, and a sincere faith.”
- OpenBible.info “Cross-reference: Ps.119.37 → Matt.5.28 (confidence: 10 votes)”
- OpenBible.info “Cross-reference: 1John.2.16 → Matt.5.28 (confidence: 10 votes)”
- Matthew (Protestant academic) “Tyndale House on Matthew 5:8: 5:8 Those whose hearts are pure (see Pss 24:3-5; 51:7; Isa 6:5) are contrasted with those who thought that they had satisfied God’s will through ceremonial conformity to tradition (Matt 23:25-26). Jesus insisted on simple, true heart-righteousness (see 6:1-24; 15:1-20; 23:23-28; Deut 6:5). • They will see God and thereby attain even more than Moses did (see Exod 33:18-23; 34:5-7; see also Ps 73:1).”
- Matthew (Protestant academic) “Tyndale House on Matthew 5:27: 5:27-30 Jesus’ righteousness uncovers sin at a deeper level than the external; he reveals the true intent of the law.”