Asa falls away from his first love of the Lord. He puts his trust in the King of Assyria and not in his Lord God. Consider the words of the prophet Hanani to Asa in 16:7-10. The Lord does not heal Asa.
“Yet even in his disease he did not seek the LORD, but sought help from physicians.” 16 v12
This is a strong word to us today. Asa, who was a king that had a heart wholly true all his days (15 v17), went astray in his pride and self-reliance.
And for us, it’s important to recognise that nothing is different for us. We can very easily slip into seeking the world’s help first. Seeking the help of experts (who are rightly expert) in whatever the situation is, rather than first seeking God’s wisdom.
Because He is our king. He is the Great Physician, the Good Shepherd, the Prince of Peace.
And it’s Him we need to rely on. See Asa’s folly. Where once he relied on God, then he relied on himself and others.
Jesus reminds us of this in Matthew 6 v33, “But seek first the kingdom of God and his righteousness, and all these things will be added to you.”