Richard P. Feynman
All mass is interaction.Collection: Mass
It is surprising that people do not believe that there is imagination in science. It is a very interesting kind of imagination, unlike that of the artist. The great difficulty is in trying to imagine something that you have never seen, that is consistent in every detail with what has already been seen, and that is different from what has been thought of; furthermore, it must be definite and not a vague proposition. That is indeed difficult.Collection: Believe
When I found out that Santa Claus wasn't real, I wasn't upset; rather, I was relieved that there was a much simpler phenomenon to explain how so many children all over the world got presents on the same night! The story had been getting pretty complicated -- it was getting out of hand.Collection: Children
The most important thing I found out from my father is that if you asked any question and pursued it deeply enough, then at the end there was a glorious discovery of a general and beautiful kind.Collection: Beautiful
It appears that there are enormous differences of opinion as to the probability of a failure with loss of vehicle and of human life. The estimates range from roughly 1 in 100 to 1 in 100,000. The higher figures come from the working engineers, and the very low figures from management.Collection: Loss
Don't worry about anything. Go out and have a good time.Collection: Worry
We've learned from experience that the truth will out.Collection: Truth Will Come Out
In fact, the science of thermodynamics began with an analysis, by the great engineer Sadi Carnot, of the problem of how to build the best and most efficient engine, and this constitutes one of the few famous cases in which engineering has contributed to fundamental physical theory. Another example that comes to mind is the more recent analysis of information theory by Claude Shannon. These two analyses, incidentally, turn out to be closely related.Collection: Engineering
Energy is a very subtle concept. It is very, very difficult to get right.Collection: Energy
But logic is not all, one needs one's heart to follow an idea.Collection: Heart
If I could explain it to the average person, I wouldn't have been worth the Nobel Prize.Collection: Average
The exception tests the rule.Collection: Exception To The Rule
Science is like sex: sometimes something useful comes out, but that is not the reason we are doing itCollection: Inspirational
You see, I get so much fun out of thinking that I don’t want to destroy this pleasant machine that makes life such a big kick.Collection: Fun
If you keep proving stuff that others have done, getting confidence, increasing the complexities of your solutions – for the fun of it – then one day you’ll turn around and discover that nobody actually did that one! And that’s the way to become a computer scientist.Collection: Fun
Our freedom to doubt was born out of a struggle against authority in the early days of science. It was a very deep and strong struggle: permit us to question – to doubt – to not be sure. I think that it is important that we do not forget this struggle and thus perhaps lose what we have gained.Collection: Strong