Robert A. Heinlein Quotes

Too much doubt is better than too much credulity.

It is equally a fault to believe all men or to believe none.

It is no sin to doubt some things, but it may be fatal to believe everything.

I hope, George, that you know what you're doing.

He that believes all misseth; he that believes nothing, hits not.

If you're not riddled with doubt, you've probably done something wrong.

Always to distrust is an error, as well as always to trust.

Our credulity is greatest concerning the things we know least about.

Too much trust is folly, in an imperfect world.

People make mistakes in life through believing too much, but they have a damned dull time if they believe too little.

It's a vice to trust all, and equally a vice to trust none.

Where was the middle ground between a sense of adventure and just plain sense?

Sometimes things seem too good to be true.

A man's most valuable trait is a judicious sense of what not to believe.

Suspicion is the beginning of wisdom, and of madness.

I would say that I'm 98 percent skeptical, but the other 2 percent [is] open for the possibility of things.

You have to take everything I say with a grain of salt.

Don't trust a brilliant idea unless it survives the hangover.

Can you trust me, he said. Not will you. Can you. Can I trust him? What do I have to lose?

Sceptics are yet the most credulous.

If ... it is not in my power to arrive at the knowledge of any truth, I may at least do what is in my power, namely, suspend judgement.

I wouldn't say Jamie is an evil genius. I'm not sure he's evil and I'm not sure he's a genius.

When in doubt, throw it out.

It is said that the night brings counsel, but it is not said that the counsel is necessarily good.

I guess you could say I'm pretty wary.