Shared ground
Psalm 36:1–4 presents an inward-to-outward profile of the “wicked” person. The passage’s explicit claims move in a clear progression: lack of “fear of God” (v.1) leads to self-flattering inner talk (v.2), which shows itself in harmful and deceptive speech (v.3), and then in deliberate planning and settled direction toward what is not good (v.4). The text describes not a single mistake but a pattern that becomes chosen and planned.
A key explicit claim is that the root problem is not mainly lack of information. The wicked person’s self-flattery blocks self-knowledge: he does not “detect and hate” his sin (v.2). The result is a dulled moral response—he “doesn’t abhor evil” (v.4)—and a life-path (“way”) that is intentionally set (v.4).
Where interpretation differs
Who is “speaking” in verse 1. Some read v.1 as the psalmist reporting an inner insight (“an oracle in my heart”) about wickedness. Others think “rebellion/transgression” is pictured as if it were speaking to the wicked person, with the line describing what wickedness “says” inside him.
What “before his eyes” mainly emphasizes. Many take it as describing the wicked person’s inner perception and priorities: God is not a real reference point in how he sees the world. Others hear more of a behavioral sense: he acts as if God is not watching, so he has no restraint.
Why the disagreement exists
Verse 1 is difficult to translate smoothly in English because the Hebrew can be read with different subjects (“oracle,” “my heart,” “transgression”). Also, phrases like “before his eyes” can describe either inner focus (what someone keeps in view) or outward conduct (how someone behaves when nothing seems to restrain him). The rest of the passage supports both angles because it links inner talk, speech, and planned action.
What this passage clearly contributes
This unit contributes a compact moral psychology: (1) the absence of reverence toward God removes an important boundary (“no fear of God,” v.1); (2) self-deception follows, not simple ignorance (“flatters himself,” v.2); (3) corruption becomes visible in communication (“words… iniquity and deceit,” v.3); and (4) evil becomes deliberate and habitual (“plots… on his bed,” “sets himself on a way,” v.4). The passage frames “wickedness” as a settled direction of the inner life that expresses itself in words and choices over time, rather than as a merely impulsive act. See also Psalm 1:1–6 for the “way” theme and Romans 1:28–32 for a similar downward moral spiral description.