Famous Quotes & Sayings

Richard P. Feynman

I can live with doubt and uncertainty and not knowing. I think it is much more interesting to live not knowing than to have answers that might be wrong. If we will only allow that, as we progress, we remain unsure, we will leave opportunities for alternatives. We will not become enthusiastic for the fact, the knowledge, the absolute truth of the day, but remain always uncertain … In order to make progress, one must leave the door to the unknown ajar.

Richard P. Feynman

Unless a thing can be defined by measurement, it has no place in a theory. And since an accurate value of the momentum of a localized particle cannot be defined by measurement it therefore has no place in the theory.

Richard P. Feynman

It is odd, but on the infrequent occasions when I have been called upon in a formal place to play the bongo drums, the introducer never seems to find it necessary to mention that I also do theoretical physics.

Richard P. Feynman

Science is a way to teach how something gets to be known, what is not known, to what extent things are known (for nothing is known absolutely), how to handle doubt and uncertainty, what the rules of evidence are, how to think about things so that judgments can be made, how to distinguish truth from fraud, and from show.

Richard P. Feynman

Scientists are explorers. Philosophers are tourists.

Richard P. Feynman

The difficulty really is psychological and exists in the perpetual torment that results from your saying to yourself, "But how can it be like that?" which is a reflection of uncontrolled but utterly vain desire to see it in terms of something familiar. ... If you will simply admit that maybe [Nature] does behave like this, you will find her a delightful, entrancing thing. Do not keep saying to yourself, if you can possible avoid it, "But how can it be like that?" because you will get 'down the drain', into a blind alley from which nobody has escaped. Nobody knows how it can be like that.

Richard P. Feynman

If you thought that science was certain - well, that is just an error on your part.

Richard Dawkins

Cheetah genes cooperate with cheetah genes but not with camel genes, and vice versa. This is not because cheetah genes, even in the most poetic sense, see any virtue in the preservation of the cheetah species. They are not working to save the cheetah from extinction like some molecular World Wildlife Fund.

Richard Whately

To teach one who has no curiosity to learn, is to sow a field without ploughing it.

F. Schumacher

Going from two wheels to four, we've seen in the past that this can be done.

Richelle Mead

Don't judge the past by the standards of today. It won't work. They're incompatible.

Ronda Rousey

Judo taught me that I am capable of anything... I can mentally push past anything and be victorious.

William Faulkner

A man or a race either if he's any good can survive his past without even needing to escape from it and not because of the high quite often only too rhetorical rhetoric of humanity but for the simple indubitable practical reason of his future: that capacity to survive and absorb and endure and still be steadfast.

Richard M. Nixon

The 1970s must be the years when America pays its debt to the past by reclaiming the purity of its air, its waters, and our living environment. It is literally now or never.

Richard M. Nixon

As we work to expand our supplies of energy, we should also recognize that we must balance those efforts with our concern to preserve our environment. In the past, as we have sought new energy sources, we have too often damaged or despoiled our land.

Richard M. Nixon

We have been through, over these years, some difficult times. During the period that I have served as President of the United States, we have been through some difficult times together, and I can only say that the friendship that we have for this nation, the respect and the admiration we have for the people of this nation, their courage, their tenacity, their firmness in the face of very great odds, is one that makes us proud to stand with Israel, as we have in the past in times of trouble, and now to work with Israel in a better time, a time that we trust will be a time of peace.

Richard Gilman

I want my poor value to exist past me, somewhere else.

Robert Dale Owen

After voluntary exertions on the part of our people to which the history of the world furnishes no parallel, is the old root of bitterness still to remain in the ground, to sprout and bear fruit in the future as it has borne fruit in the past?

Leo Tolstoy

In infinite time, in infinite matter, in infinite space, is formed a bubble organism, and that bubble lasts a while and bursts, and that bubble is Me.