“Have you realized that most of your unhappiness in life is due to the fact that you are listening to yourself instead of talking to yourself?” Martyn Lloyd Jones
“You keep him in perfect peace whose mind is stayed on you, because he trusts in you. Trust in the Lord forever, for the Lord God is an everlasting rock.” (Isaiah 26:3-4)
Growing in Christ includes putting off sinful behaviors and putting on Christ-like ones, but it begins with battling at the levels of the heart (desires) and mind (thinking). The two are inseparable (Matt. 15:18-19). The heart leads our head down certain ways of thinking, and our wrong thinking reinforces wrong desires.