Shared ground
Psalm 16:7 presents guidance as a reason for praise. The speaker says he will “bless Yahweh” because Yahweh “has given” him counsel. The credit goes to Yahweh, not to the speaker’s skill or success.
The second line describes that guidance as continuing inwardly: the speaker experiences instruction within himself “in the night seasons.” Night language can naturally include quiet reflection, vulnerability, or sleepless worry, but the main point is that counsel is not limited to public moments or daytime decisions.
Where interpretation differs
The main question is what the speaker means by “my heart instructs me.” Some read this as the speaker’s inner moral sense and reasoning working through Yahweh’s counsel (an inward confirmation or correction). Others read it more strongly as Yahweh’s direction operating within the person at night—so the “heart” is the place where divine guidance is felt, not an independent source of truth.
Why the disagreement exists
The verse states both realities side by side—Yahweh gives counsel, and the “heart” instructs—without explaining the mechanism. Also, “heart” here likely refers to the inner self (thoughts, conscience, deep desires), and that range of meaning leaves room for different emphases.
What this passage clearly contributes
Explicitly, the text links gratitude (“I will bless”) to received direction (“has given me counsel”) and portrays that direction as ongoing (“in the night seasons”). By placing Yahweh’s counsel alongside inward instruction, the verse portrays guidance as something a person experiences internally over time, not merely as an external message or a one-time event (Psalm 16:7).