It is a powerful short warning about how self-esteem teachings go directly against the grain of what God really wants for you, which is His revealed will in the Bible).
Consider the striking words of Jeremiah concerning those who promote self-contentment:
Thus says the Lord of hosts: “Do not listen to the words of the prophets who prophesy to you, filling you with vain hopes. They speak visions of their own minds, not from the mouth of the Lord. They say continually to those who despise the word of the Lord, ‘It shall be well with you’; and to everyone who stubbornly follows his own heart, they say, ‘No disaster shall come upon you.’”