The difference between stupidity and genius is that genius has its limits.
Thinking is the hardest work there is; which is probably the reason why so few engage in it.
Intelligence without ambition is a bird without wings.
A smart man makes a mistake; learns from it; and never makes that mistake again. But a wise man finds a smart man and learns from him how to avoid the mistake altogether.
Promise me you'll always remember: You're braver than you believe; and stronger than you seem; and smarter than you think.
When you reach the end of your rope; tie a knot in it and hang on.
Franklin D. Roosevelt
Ralph Waldo Emerson
P. J. O'Rourke
Henry David Thoreau
George Bernard Shaw