The belief that there is only one truth and that oneself is in possession of it seems to me the deepest root of all evil that is in the world.

The belief in a single truth is the root cause for all evil in the world.

To present a scientific subject in an attractive and stimulating manner is an artistic task, similar to that of a novelist or even a dramatic writer. The same holds for writing textbooks.

We need to make a world in which fewer children are born, and in which we take better care of them.

If alpha [the fine-structure constant] were bigger than it really is, we should not be able to distinguish matter from ether [the vacuum, nothingness], and our task to disentangle the natural laws would be hopelessly difficult. The fact however that alpha has just its value 1/137 is certainly no chance but itself a law of nature. It is clear that the explanation of this number must be the central problem of natural philosophy.

Intellect distinguishes between the possible and the impossible; reason distinguishes between the sensible and the senseless. Even the possible can be senseless.

The belief that there is only one truth and that oneself is in possession of it seems to me the deepest root of all evil that is in the world.