Commentators explain that this verse gives a two-part instruction. 'Wait for the Lord' is a call to patient trust, hope, and complete dependence on God, especially during trials. 'Keep his way' is the active component, urging steadfast obedience to God's commands without being swayed by temptation or opposition. As John Calvin notes, these two actions are linked; true patience and hope prevent us from resorting to sinful shortcuts.