The difference between stupidity and genius is that genius has its limits.
Albert Einstein

The first day of spring is one thing, and the first spring day is another. The difference between them is sometimes as great as a month.
Henry Van Dyke

Good habits formed at youth make all the difference.
Aristotle

The difference between involvement and commitment is like ham and eggs. The chicken is involved; the pig is committed.
Martina Navratilova

The whole difference between construction and creation is exactly this: that a thing constructed can only be loved after it is constructed; but a thing created is loved before it exists.
Charles Dickens

The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair.
Douglas Adams

Our intuition about the future is linear. But the reality of information technology is exponential, and that makes a profound difference. If I take 30 steps linearly, I get to 30. If I take 30 steps exponentially, I get to a billion.
Ray Kurzweil