"Use your body right:  warm it up before you put it under strain. Use your mind right:  psyche it up before you put it under strain." -– Tom Hopkins  

"Success and failure are an inside game. Transform your thinking and you transform your world." -– James A. Ray  

"Your thoughts are the architects of your destiny." -- David O. McKay  

"You are in an ongoing process of becoming, growing, and developing in the direction of your dominant thoughts.  What are they?" -– Brian Tracy  

"Your state of mind creates your state of results." -– Mark Victor Hansen

"The brain is like a muscle.  When we think well, we feel good." -- Carl Sagan  

"It is the mark of an educated mind to be able to entertain a thought without accepting it." -- Aristotle  

"The soul attracts that which it secretly harbors; that which it loves, and also that which it fears; it reaches the height of its cherished aspirations; it falls to the level of its unchastened desires.  Every thought-seed sown or allowed to fall into the mind, and to take root there, produces its own, blossoming sooner or later into act, and bearing its own furtive of opportunity and circumstance.   Good thoughts bear good fruit; bad thought, bad fruit." -- James Allen  

"You are a living magnet.  What you attract into your life is in harmony with your dominant thoughts." -– Brian Tracy

"Men are not prisoners of fate, but only prisoners of their own minds." -- Franklin Delano Roosevelt  

"You are today where your thoughts have brought you; you will be tomorrow where your thoughts take you." -- James Allen  

"Think!  There is no problem that is not amenable to the power of sustained thinking." -– Brian Tracy

"Readers are plentiful; thinkers are rare." -- Harriet Martineau  

"Thinking has great value to most people...only when it is done though...which actually is rare..." -- Doug Firebaugh 

"Few people think more than two or three times a year. I have made an international reputation for myself by thinking once or twice a week." -- George Bernard Shaw  

"It is your ability to think that is your chief source of value, in fact, you are a mind with a body to carry it around in." -– Brian Tracy