What you create through your thoughts is a belief system, and that belief system is ultimately what determines whether you live a successful life. The key to changing your belief system is changing your thoughts.

Orison Swett Marden wrote in How to Get What You Want, "Stop thinking trouble if you want to attract its opposite; stop thinking poverty if you wish to attract plenty.  Refuse to have anything to do with the things you fear, the things you do not want." Instead you must think rightly about those things you want to attract. Mark Shearon once posed a very enlightening question to a telephone audience, "Are you thinking about what you're thinking about?" Read that sentence again and read it carefully. It's not a play on words.

Marden goes on to write this passage about how much our thoughts influence the outcome of our life: "How often do we hear it said of some man, "Everything he undertakes succeeds," or "Everything he touches turns to gold?" Why? Because the man is constantly picturing to himself the success of his undertakings and he is backing up his vision by his efforts. By clinging to his vision, by vigorous resolution and persistent, determined endeavor he is continually making himself a powerful magnet to draw his own to him. Consciously or unconsciously, he is using the divine intelligence or force by the use of which every human being may mold himself and his environment according to the pattern in his mind."