All human beings by nature desire to know.

One swallow does not make a spring.

Virtue lies in the middle.

Virtue is a kind of mean.

Man is by nature a political animal.

Act as if what you do makes a difference. It does.

-- William James

Think on the shop floor; act on the shop floor.

-- Sakichi Toyoda

Waste no more time arguing about what a good man should be. Be one.

-- Marcus Aurelius

You don't learn to walk by following rules. You learn by doing, and by falling over.

-- Richard Branson

It is hard to retain what you learn unless you practice it.

-- Seneca

If you think you're too small to have an impact, try going to bed with a mosquito.

-- Anita Roddick