7:3 Nathan said - Pursue thy intentions, and build an house for the ark. The design being pious and the thing not forbidden by God, Nathan hastily approves it, before he had consulted God about it, as both he and David ought to have done in a matter of so great moment. And therefore Nathan meets with this rebuke, that he is forced to acknowledge his error, and recant it. For the holy prophets did not speak all things by prophetic inspiration, but some things by an human spirit.
7:1-3 David being at rest in his palace, considered how he might best employ his leisure and prosperity in the service of God. He formed a design to build a temple for the ark. Nathan here did not speak as a prophet, but as a godly man, encouraging David by his private judgment. We ought to do all we can to encourage and promote the good purposes and designs of others, and, as we have opportunity, to forward a good work.