Explore Quotes by Robert A. Heinlein

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If tempted by something that feels 'altruistic,' examine your motives and root out that self-deception. Then, if you still want to do it, wallow in it!

If you happen to be one of the fretful minority who can do creative work, never force an idea; you'll abort it if you do. Be patient and you'll give birth to it when the time is ripe. Learn to wait.

Never do today what you can put off till tomorrow if tomorrow might improve the odds.

Peace is an extension of war by political means. Plenty of elbow-room is pleasanter -- and much safer.

Moving parts in rubbing contact require lubrication to avoid excessive wear. Honorifics and formal politeness provide lubrication where people rub together. Often the very young, the untravelled, the naive, the sophisticated deplore these formalities as 'empty,' 'meaningless,' or 'dishonest,' and scorn to use them. No matter how 'pure' their motives, they thereby throw sand into machinery that does not work too well at best.

Responsibility cannot be shared.

It may be better to be a live jackal than a dead lion, but it is better still to be a live lion. And usually easier.

The truth of a proposition has nothing to do with its credibility. And vice versa.

It's amazing how much 'mature wisdom' resembles being too tired.

A brute kills for pleasure. A fool kills from hate.

Of all the strange 'crimes' that human beings have legislated out of nothing, 'blasphemy' is the most amazing -- with 'obscenity' and 'indecent exposure' fighting it out for second and third place.

Most 'scientists' are bottle washers and button sorters.

Men are more sentimental than women. It blurs their thinking.

Anyone who clings to the historically untrue-and thoroughly immoral-doctrine that, 'violence never settles anything' I would advise to conjure the ghosts of Napoleon Bonaparte and the Duke of Wellington and let them debate it. The ghost of Hitler could referee, and the jury might well be the Dodo, the Great Auk and the Passenger Pigeon. Violence, naked force, has settled more issues in history than has any other factor, and the contrary opinion is wishful thinking at its worst. Breeds that forget this basic truth have always paid for it with their lives and freedom.

By the data to date, there is only one animal in the Galaxy dangerous to man -- man himself. So he must supply his own indispensable competition. He has no enemy to help him.

The Earth is just too small and fragile a basket for the human race to keep all its eggs in.

Remember this: once the human race is established on more than one planet and especially, in more than one solar system, there is no way now imaginable to kill off the human race.

Once you get to earth orbit, you're halfway to anywhere in the solar system.

A religion is a source of happiness and I would not deprive anyone of happiness. But it is a comfort appropriate for the weak, not for the strong--and you are strong. The great trouble with religion--any religion--is that the religionist, having accepted certain propositions by faith, cannot thereafter judge these propositions by evidence. One may bask at the warm fire of faith or choose to live in the bleak uncertainty of reason--but one cannot have both.

My folks tried to make a preacher of me and missed by a narrow margin… I would have made a good one if I hadn’t fallen into the fatal folly of reading anything I could lay hands on. With just a touch more self confidence and a liberal helping of ignorance I could have been a famous evangelist.

There comes a time in the life of every human when he or she must decide to risk ‘his life, his fortune and his sacred honor’ on an outcome dubious. Those who fail the challenge are merely overgrown children, can never be anything else.

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