Every thought engenders another thought. Write one idea and others will follow until you have written a page. You cannot fathom your own mind; it has neither bottom nor boundaries. Your first thoughts may be crude; but as you go on thinking you will use more and more of yourself; you will quicken new brain cells into activity and you will develop new faculties. Heredity, environment, circumstances, all things must give way before you if you practice sustained and continuous thought. But, on the other hand, if you neglect to think for yourself and only use other people’s thought, you will never know what you are capable of; and you will end by being incapable of anything.  

There can be no real greatness without original thought. All that a man does outwardly is the expression and completion of his inward thinking. No action is possible without thought, and no great action is possible until a great thought has preceded it. Action is the second form of thought, and personality is the materialization of thought. Environment is the result of thought; things group themselves or arrange themselves around you according to your thought. There is, as Emerson says, some central idea or conception of yourself by which all the facts of your life are arranged and classified. Change this central idea and you change the arrangement or classification of all the facts and circumstances of your life. You are what you are because you thin k as you do; you are where you are because you think as you do.