Richard P. Feynman Quotes

Il n'est pas certain que tout soit incertain. (Translation: It is not certain that everything is uncertain.)

There's something beautifully soothing about a fact — even (or perhaps especially) if we're not sure what it means.

We can be absolutely certain only about things we do not understand.

The more I see the less I know for sure.

There is only one thing about which I am certain, and that is that there is very little about which one can be certain.

Ignorance never settles a question.

I am no lover of disorder and doubt as such. Rather do I fear to lose truth by this pretension to possess it already wholly.

To be absolutely certain about something, one must know everything or nothing about it.

No one knows anything for sure.

Doubt is really a groping ignorance.

The more I see, the less I know.

Where doubt there truth is - 'tis her shadow.

We know nothing in reality; for truth lies in an abyss.

Doubt is long-winded. Certainty is brief.

The world is not a solid continent of facts sprinkled by a few lakes of uncertainties, but a vast ocean of uncertainties speckled by a few islands of calibrated and stabilized forms

... no bell in us tolls to let us know for certain when truth is in our grasp.

To know much is often the cause of doubting more.

Seeing is believing and believing is knowing and knowing beats unknowing and the unknown.

What can we say with certainty?

It was better to know the worst than to wonder.

Doubt is the vestibule through which all must pass before they can enter into the temple of wisdom.

Because a known fact is better than an unknown fact.

No authority is higher than reality.

Truth will always be truth, regardless of lack of understanding, disbelief or ignorance.