"What the heart most wants the mind finds reasonable, the emotions find valuable, and the will finds doable" (pg. 159).
It reminds me of a conversation in Lauren Winner's book, Still. Lauren was talking to a married female friend who told her she had lunch with a male acquaintance while her husband was out of town on business. They shared a common interest in literature. She asked Lauren, "Is this how affairs start?"
Lauren had several conversations with this friend but couldn't convince her to break off the relationship. In due course her friend had an affair with this man that was short-lived and extremely damaging to all parties.
This woman's heart wanted the relationship so her mind found it reasonable, her emotions found it valuable, and her will found it doable, but it ended in disaster.
Two verses come to mind:
The heart is deceitful above all things, and desperately wicked: who can know it? (Jeremiah 17:9 KJV).
Above all else, guard your heart, for everything you do flows from it (Proverbs 4:23).