Unless you are willing to drench yourself in your work beyond the capacity of the average man, you are just not cut out for positions at the top.
There are glimpses of heaven to us in every act, or thought, or word, that raises us above ourselves.
Every man is said to have his peculiar ambition. Whether it be true or not, I can say for one that I have no other so great as that of being truly esteemed of my fellow men, by rendering myself worthy of their esteem. (Said at age 23 while a candidate for the state legislature)
Five great enemies to peace inhabit within us; avarice, ambition, envy, anger and pride. If those enemies were to be banished, we should infallibly enjoy perpetual peace.
Ambition often puts men upon doing the meanest offices: so climbing is performed in the same posture with creeping.
Most people would succeed in small things, if they were not troubled with great ambitions.
If you wish to reach the highest, begin at the lowest.
Keep away from people who try to belittle your ambitions. Small people always do that, but the really great make you feel that you, too, can become great.
Not failure, but low aim, is crime.
Ambition is a vice, but it may be the father of virtue.