AS A MAN THINKETH!

THOUGHT AND CHARACTER
THE aphorism, "As a man thinketh in his heart so is he," not only embraces the whole of a man’s being, but is so comprehensive as to reach out to every condition and circumstance of his life. A man is literally what he thinks, his character being the complete sum of all his thoughts.
As the plant springs from, and could not be without, the seed, so every act of a man springs from the hidden seeds of thought, and could not have appeared without them. This applies equally to those acts called "spontaneous" and "unpremeditated" as to those, which are deliberately executed.
Act is the blossom of thought, and joy and suffering are its fruits; thus does a man garner in the sweet and bitter fruitage of his own husbandry.
"Thought in the mind hath made us, What we are, By thought was wrought and built. If a man’s mind Hath evil thoughts, pain comes on him as comes The wheel the ox behind....
..If one endure
In purity of thought, joy follows him As his own shadow—sure."

Culled from James Allen's AS A MAN THINKETH.