Thoughts have to be understood and applied rightly before they are effective. Ideas first enter man’s mind in a crude or undigested form; they need to be assimilated by deep reflection. A thought without soul conviction behind it has no value. That is why persons who use affirmations without comprehending the truth on which they are based — man’s inseverable unity with God — get poor results and complain that thoughts have no healing power. - Paramahansa Yogananda.