What does 1 Chronicles 28:9 mean?

And you, Solomon my son, get to know the God your father serves. Serve him with all your heart and a willing mind, because the Lord sees what’s really inside us and understands every thought. If you look for him, you’ll find him. But if you turn your back on him, he’ll reject you forever. 1 Chronicles 28:9 - Modern Text Bible

(David gives Solomon personal advice: have a real relationship with God, serve him sincerely, because God knows what’s in your heart. God is available if you seek him, but he won’t force himself on you.)