2 Chr 12:14
He did evil because he had not set his heart on seeking the LORD.

What a potent and applicable verse for us today! If we as Believers do not set our heart on seeking the Lord, we are inclined to do evil. How do we seek the Lord?  The word "seek" in both Greek and Hebrew means "to search out, to look for", etc. but it has a more detailed specific meaning "to crave", specifically in regards to worshiping God.  So, we are to crave Him to worship Him.  WOW!

Shemaiah explained to the leaders of Judah the reason for the invasion from Egypt was that it was discipline from God. They had to learn the difference between serving God and serving the world.
How about us as Believers, can’t we just learn the difference and not have to go through the discipline?  Life would be so much simpler that way.

2 Chr 13:18
The men of Israel were subdued on that occasion, and the men of Judah were victorious because they relied on the LORD, the God of their fathers.
Very important to rely on the Lord and not our own strength! We fall miserably short!

I King 15:3
He committed all the sins his father had done before him; his heart was not fully devoted to the LORD his God, as the heart of David his forefather had been.

Abijah followed in the footsteps of Solomon who allowed his wives to entice him to turn his heart after other gods. (IKing 11:4)

What does it mean to have our hearts fully devoted to the Lord? What kind of witness would we be to unbelievers if our hearts were fully devoted to the Lord?  If we were craving Him to worship Him?  We might just stand out from the crowd.