“That which man thinks upon in one life, he becomes in another. If the mind dwells continually upon one train of thought, a groove is formed into which the thought-force runs automatically and such a habit of thought survives death and since it belongs to the ego, is carried over to the subsequent earth life as a thought tendency and capacity.
Every thought has got its own mental image. Every man has a mental world of his own, his own views, his own sentiments, his own feelings, his own habitual thoughts, his own experience and his own mode of thinking. The essence of the various mental images formed in one particular physical life is being worked out in the mental plane. It constitutes the basis for the next physical life. Just as a new physical body is formed in every birth, so also a new mind and a new Buddhi are formed in every birth.
It is difficult to explain the detailed workings of thought and Karma. Every Karma produces twofold effects, one on the individual mind and the other on the world. Man makes the circumstances of his future life by the effect of his actions upon others.
Every action has a past which leads up to it; every action has a future which proceeds from it. An action implies a desire which prompted it and a thought which shaped it. Each act is a link in an endless chain of causes and effects, each effect becoming a cause and each cause having been an effect; and each link in the endless chain is welded out of three components-desire, thought and activity. A desire stimulates a thought; a thought embodies itself in an act.
Selfish coveting of the possessions of others, though never carried out into active cheating in the present, makes one a thief in a later earth-life, while hatred and revenge secretly cherished are the seeds from which the murderer springs. So again, unselfish loving yields as harvest the philanthropist and the saint; and every thought of compassion helps to build the tender and pitiful nature which belongs to one who is a friend to all creatures.”