Life is constantly pounding you from the outside with millions of hammer blows, but you have the last word as to how those blows will change you.  Humans alone, of all the creatures of earth, can change their own pattern.  Humans alone are the architects of their destiny.  William James declared that the greatest revolution in his generation was the discovery that human beings, by changing the inner attitudes of their minds, can change the outer aspects of their lives.
–Wilferd A. Peterson