That Mars is inhabited by beings of some sort or other we may consider as certain as it is uncertain what these beings may be.

Imagination is as vital to any advance in science as learning and precision are essential for starting points.

Formulae are the anaesthetics of thought, not its stimulants and to make any one think is far better worth while than cramming him with ill-considered, and therefore indigestible, learning.

Are physical forces alone at work there, or has evolution begotten something more complex, something not akin to what we know on Earth as life? It is in this that lies the peculiar interest of Mars.

War is a survival among us from savage times and affects now chiefly the boyish and unthinking element of the nation.

Now when we think that each of these stars is probably the centre of a solar system grander than our own, we cannot seriously take ourselves to be the only minds in it all.

The whole object of science is to synthesize, and so simplify; and did we but know the uttermost of a subject we could make it singularly clear.

Why can't the ex-Chemist have a second chance? I get that we're kids and he's an adult, but you don't learn everything before you grow up. You learn until grass grows on your grave.

Never mind of what your enemy thinks of you, relax and think a head of him.

I'm not human. I'm a piece of machinery. I don't need to feel a thing. Just forge on ahead.

You'll get much better results by being upfront, answering creditors calls, and responding to their letters. Delaying the inevitable only digs a deeper hole.

If you can find true contentment, it will last forever.

When bitter enemies make peace, surely some bitterness remains.

Organization of khaddar is infinitely better than co-operative societies or any other form of village organization.

Civility cost nothing.

The mortal experience . . . is not like a college course which we can passively audit. Instead, we are taking life's course for credit and there are no summers off - not even semester breaks.