Only by much searching and mining are gold and diamonds obtained, and man can find every truth connected with his being, if he will dig deep into the mine of his soul; and that he is the maker of his character, the moulder of his life, and the builder of his destiny, he may unerringly prove: if he will watch, control, and alter his thoughts, tracing their effects upon himself, upon others, and upon his life and circumstances linking cause and effect by patient practice and investigation, and utilizing his every experience, even to the most trivial, everyday occurrence, as a means of obtaining that knowledge of himself which is Understanding, Wisdom, Power.
James Allen, As a Man Thinketh