Ambition is the unseen force which drives men to success, to rise above their environment and 
to achieve the impossible. Have ambition which is content not only with making a satisfactory 
record in college, but also seeks to render service to humanity through science and its 
application. Strive to foster that ambition which leads a man ever onward in the belief that he 
may somehow contribute to the betterment of mankind. 

Brothers and sisters, I do not consider myself yet to have taken hold of it. But one thing I do: Forgetting what is behind and straining toward what is ahead, I press on toward the goal to win the prize for which God has called me heavenward in Christ Jesus.
— Philippians 3:13-14 New International Version (NIV)