Here is a collection of some of my favorite quotes, sorted by general topic.
Math Quotes
"If in other sciences we should arrive at certainty without doubt and truth without error, it behooves us to place the foundations of knolwedge in mathematics." -Roger Bacon
"The whole is greater than the sum of its parts." -Aristotle
"It is a mathematical fact that fifty percent of all doctors graduate in the bottom half of their class." -Anonymous
"Do not worry about your problems with mathematics, I assure you mine are far greater." -Albert Einstein
"Pure mathematics is, in its way, the poetry of logical ideas." -Albert Einstein
"Math is like love -- a simple idea but it can get complicated." -Anonymous
"Black holes result from God dividing the universe by zero." -Anonymous
"Arithmetic is being able to count up to twenty without taking off your shoes." -Mickey Mouse
"The essence of mathematics is not to make simple things complicated, but to make complicated things simple." -Stan Gudder
"The infinite! No other question has ever moved so profoundly the spirit of man." -David Hilbert
"Math is a four-letter word." -Anonymous
"One and one and one is three." -The Beatles
"Music is the pleasure the human mind experiences from counting without being aware that it is counting." -Leibniz
"The laws of nature are but the mathematical thoughs of God." -Euclid
"What we know is not much. What we do not know is immense." -Laplace
"Mathematics is a game played according to certain simple rules with meaningless marks on paper." -David Hilbert
"In mathematics, you don't understand thins. You just get used to them." -Johann von Neumann
"There are two ways to do great mathematics. The first is to be smarter than everybody else. The second way is to be stupider than everybody else -- but persistent." -Raoul Bott
"A mathematical truth is neither simple nor complicated in itself, it is. -Emile Lemoine
"Statistically, 100% of the shots you don't take, don't go in." -Wayne Gretsky
"The hardest arithmetic to master is that which enables us to count our blessings." -Eric Hoffer
Education-Related Quotes
"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former." -Albert Einstein
"A wise man will hear, and will increase learning; and a man of understanding shall attain unto wise counsels." -Proberbs 1:5
"I do not feel obliged to believe that the same God who has endowed us with sense, reason, and intellect has intended us to forgo their use." -Galileo Galilei
"There is no wealth like knowledge, no poverty like ignorance." -Ali ibn Abi-Talib
"Education is the power to think clearly, the power to act well in the world's work, and the power to appreciate life." -Brigham Young
"I hear and I forget. I see and I remember. I do and I understand." -Chinese Proverb
"It is not enough to have a good mind. The main thing is to use it well." -Rene Descartes
"If you are not willing to learn, no one can help you. If you are determined to learn, no one can stop you." -Anonymous
"Faith and reason are like two wings on which the human spirit rises to the contemplation of truth; and God has placed in the human heart a desire to know the truth - in a word, to know himself - so that, by knowing and loving God, men and women may also come to the fullness of truth about themselves." -Pope John Paul II
"That which we persist in doing becomes easier, not that the task itself has become easier, but that our ability to perform it has improved." -Ralph Waldo Emerson
"Facts do not cease to exist because they are ignored." -Aldous Huxley
"When you have eliminated the impossible, what ever remains, however improbable must be the truth." -Sherlock Holmes
"To conquer fear is the beginning of wisdom." -Bertrand Russell
"I have never met a man so ignorant that I couldn't learn something from him." -Galileo Galilei
General Quotes
"The man who moves a mountain begins by carrying away small stones." -Confucius
"If your ship doesn't come in, swim out to it." -Jonathan Winters
"Anyone can count the seeds in an apple, but no one can count the apples in a seed." -Anonymous
"Nothing will work unless you do." -Maya Angelou
"It's so simple to be wise. Just think of something stupid to say, and then don't say it." -Sam Levenson
"They always say that time changes things, but you actually have to change them yourself." -Andy Warhol
"My motto was always to keep swinging. Whether I was in a slump or feeling badly or having trouble off the field, the only thing to do was keep swinging." -Hank Aaron
"Look at a day when you are supremely satisfied at the end. It's not a day when you lounge around doing nothing; it's when you had everything to do, and you've done it." -Margaret Thatcher
"Only a life lived for others is a life worthwhile." -Albert Einstein
"Eighty percent of success is showing up." -Woody Allen
"...to stop rushing around, to sit quietly on the grass, to switch off the world and come back to the earth, to allow the eye to see a willow, a bush, a cloud, a leaf, is 'an unforgettable experience'..."-Frederick Franck
"Even the darkest night will end and the sun will rise." -Les Miserables, Finale
"I've learned that people will forget what you said, people will forget what you did, but people will never forget how you made them feel." -Maya Angelou
"People often say that motivation doesn't last. Well, neither does bathing. That's why we recommend it daily." -Zig Ziglar
"The best revenge is massive success." -Frank Sinatra
"When I was 5 years old, my mother always told me that happiness was the key to life. When I went to school, they asked me what I wanted to be when I grew up. I wrote down `happy'. They told me I didn't understand the assignment, and I told them they didn't understand life." -John Lennon
"I learned that courage was not the absence of fear, but the triumph over it. The brave man is not he who does not feel afraid, but he who conquers that fear." -Nelson Mandela
"You never change something by fighting the existing reality. To change something, build a new model that makes the existing model obsolete." -R. Buckminster Fuller
"Light travels faster than sound. That's why some people appear bright until you hear them speak." -Anonymous
"Imagination will often carry us to worlds that never were. But without it we go nowhere." -Carl Sagan
"It is better to light a candle than to curse the darkness." -Chinese Proverb
"In theory, there is no difference between theory and practice. But in practice, there is." -Yogi Berra
"Only those who will risk going too far can possibly find out how far one can go." -T.S. Eliot
"Everyone has inside of him a piece of good news. The good news is that you don't know how great you can be! How much you can love! What you can accomplish! And what your potential is!" -Anne Frank
"God could not be everywhere, so He made mothers." -The Talmud
"When I stand before God at the end of my life, I would hope that I would not have a single bit of talent left and could say, I used everything you gave me." -Erma Bombeck
"Fear is a disease that eats away at logic and makes man inhuman." -Marian Anderson
Quotes from Fortune Cookies
"Feeding a cow with roses does not get extra appreciation."
"Ability will enable a man to get to the top, but character will keep him from falling."
"I would rather attempt something great and fail than attempt to do nothing and succeed."
"Analyze only when necessary."
"We must always have old memories and young hopes."