"As A Man Thinketh" by James Allen, A man who believed in the power of thought.

 "As a being of power, intelligence, and love, and the lord of his own thoughts, man holds the key to every situation, and has within himself the means of transforming himself into what he will."

"All that a man achieves and all that he fails to achieve is the direct result of his own thoughts.  In a justly ordered universe, individual responsibility must be absolute.  A man's weakness and strength, purity and impurity, are his own, and not another man's.  They are brought about by himself, and not by another.  They can only be altered by himself, never by another.  His condition also is his own.  His suffering and his happiness are evolved from within.  As he thinks, so he is; as he continues to think, so he remains."