HEART COMPLETELY HIS?

2 Chron 16:9
9 "For the eyes of the LORD move to and fro throughout the earth that He may strongly support those whose heart is completely His. NASU
** Wow! Not only support us, but STRONGLY SUPPORT us! Ok, yep there is a catch…. “those whose heart is COMPLETELY His.” So I guess that would mean that if your heart is not completely His, He will not strongly support. I suppose that this would bring me to two responses…. Either I can give my heart completely to Him and be strongly supported or keep my heart to myself and not have the support of the Lord… Hmmmm…. What should I do? Lord, I fully give my heart to you.