Tweet Any idea, plan, or purpose may be placed in the mind through repetition of thought. Quote by Napoleon Hill. You May Also Like...Whatever the mind can conceive and believe, it can achieve.Every adversity, every failure, every heartache carries with it the seed on an equal or greater benefit.Think good, and good follows. Think evil, and evil follows. You are what you think all day long.Thinking is the talking of the soul with itself.Folks are usually about as happy as they make their minds up to be.Effort only fully releases its reward after a person refuses to quit.Remind yourself frequently that the healing power is in your own subconscious mind.There is only one process of healing and that is faith. There is only one healing power, namely, your subconscious mind.He can who thinks he can, and he can't who thinks he can't. This is an inexorable, indisputable law.