Psalms 101:4
A perverse heart shall depart from me;
What it says
A perverse heart must depart from him, and he will have nothing to do with evil.
What it is doing
This verse deepens the vow by moving from outward acts to inward disposition.
In context
1A Psalm of David. 2I will ponder the way that is blameless — 3I will set no worthless thing 4A perverse heart shall depart from me; 5Whoever slanders his neighbor in secret, 6My eyes favor the faithful of the land, 7No one who practices deceit 8Every morning I will remove all the wicked of the land,