Proverbs 4:23 NLT - Guard your heart above all else, for it determines the course of your life.
Everything good and bad in your life originates in the heart. Just as your heart is a fountain of blood, in a spiritual sense it is a fountain of life.
Mark 11:25 NLT - But when you are praying, first forgive anyone you are holding a grudge against, so that your Father in heaven will forgive your sins, too.
An offense leads to a grudge, which leads to resentment, which leads to unforgiveness, which leads to bitterness, which finally leads to hatred.
Mark 11:23 NLT - I tell you the truth, you can say to this mountain, "May you be lifted up and thrown into the sea," and it will happen. But you must really believe it will happen and have no doubt in your heart.
A disappointment leads to a loss of faith, which leads to not trusting God, which leads to fear, which leads to despair and terror.
Proverbs 7:25 NLT - Don't let your hearts stray away toward her. Don't wander down her wayward path.
Ezekiel 36:26 NLT - And I will give you a new heart, and I will put a new spirit in you. I will take out your stony, stubborn heart and give you a tender, responsive heart.
When I turn my eyes from need, I develop a layer around my heart. When I push away the voice of God, I develop a layer around my heart.