William H. McCallum

"Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding."

"The best way to understand something is to try to explain it to someone else."

"A good teacher is like a candle - it consumes itself to light the way for others."

"In mathematics, you don't understand things. You just get used to them."

"The purpose of computing is insight, not numbers."

"Education is not the filling of a pail, but the lighting of a fire."

"Success is not final, failure is not fatal: it is the courage to continue that counts."

"Life is what happens when you're busy making other plans."

"The only true wisdom is in knowing you know nothing."

"Love all, trust a few, do wrong to none."

"Happiness is not by chance, but by choice."

"A friend is someone who knows all about you and still loves you."

"Family is not an important thing. It's everything."

"Hope is the thing with feathers that perches in the soul."

"Courage is resistance to fear, mastery of fear - not absence of fear."

"The only way to do great work is to love what you do."

"Change is the only constant in life."

"Knowledge is power."

"Time flies when you're having fun."

"The truth will set you free."

"Freedom is not free."

"Peace begins with a smile."

"In every walk with nature, one receives far more than he seeks."

"Art washes away from the soul the dust of everyday life."

"Science is organized knowledge."

"Music is the universal language of mankind."

"Faith is taking the first step even when you can't see the whole staircase."

"A leader is one who knows the way, goes the way, and shows the way."

"Hard work never killed anybody, but why take the chance?"

"Dream as if you'll live forever, live as if you'll die today."