There is no greater impediment to the advancement of knowledge than the ambiguity of words.
Thomas Reid
If you do what you've always done, you'll get what you've always gotten.
Tony Robbins
You create your own reality.
Jane Roberts
It is the set of the sails, not the direction of the wind that determines which way we will go.
Jim Rohn
Nobody cares how much you know, until they know how much you care.
Theodore Roosevelt
We see things as we are, not as they are.
Leo Rosten
People who know little are usually great talkers, while men who know much say little.
Jean-Jacques Rousseau
A fine quotation is a diamond in the hand of a man of wit and a pebble in the hand of a fool.
Joseph Roux
If in doubt, don't. If still in doubt, do what's right.
Donald Rumsfeld
Quality is never an accident. It is always the result of intelligent effort.
John Ruskin