Heart and mind Why do you think God places such a premium on guarding the heart and mind.? Proverbs 23: 7 ----- For as he thinketh in his heart , so is he. Because the HEART is the centre of our feeling and the MIND is where our thoughts and imaginations are stored. Isaiah 26: 3--- Thou wilt keep him in perfect peace whose mind is stayed on thee--- because He trusteth in thee. 2 Tim: 1-7---- for God hath not given us the Spirit of fear; but of power, and of sound mind. So that is why it is very important what we put into our minds because what we put in will be what will come out.