Prediction is difficult, especially the future.
Every valuable human being must be a radical and a rebel, for what he must aim at is to make things better than they are.
One must always do what one really cannot.
The meaning of life consists in the fact that it makes no sense to say that life has no meaning.
If an idea does not appear bizarre, there is no hope for it.
When asked ... [about] an underlying quantum world, Bohr would answer, 'There is no quantum world. There is only an abstract quantum physical description. It is wrong to think that the task of physics is to find out how nature is. Physics concerns what we can say about Nature.'