" A man's weakness and strength, purity and impurity, are his own, and not another man's; they are brought about by himself, and not by another; and they can only be altered by himself, never by another. His condition is also his own, and not another man's. His suffering and his happiness are evolved from within. As he thinks, so he is; as he continues to think, so he remains. "

― James Allen , As a Man Thinketh