It is never too late to give up our prejudices.
Computer Science is no more about computers than astronomy is about telescopes.
There are plenty of good five-cent cigars in the country. The trouble is they cost a quarter. What this country needs is a good five-cent nickel.
Flattery is like cologne water, to be smelt of, not swallowed.
What other dungeon is so dark as one's own heart! What jailer so inexorable as one's self!
They are ill discoverers that think there is no land, when they can see nothing but sea.
Don't be afraid to take a big step if one is indicated. You can't cross a chasm in two small jumps.