"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. How far I shall
succeed in gratifying this ambition, is yet to be developed."
Source:: March 9, 1832 – First Political Announcement
The way for a young man to rise is to improve himself every way he can,
never suspecting that anybody wishes to hinder him.
Source:Letter to William Herdon, July 1848
You are ambitious, which, within reasonable bounds, does good rather
Source:Letter to General Joseph Hooker, Jan 26, 1863