Sometimes the child in one behaves a certain way and the rest of oneself follows behind, slowly shaking its head.
Prediction is very difficult, especially if it's about the future.
Truth is something that we can attempt to doubt, and then perhaps, after much exertion, discover that part of the doubt is not justified.
Everything we call real is made of things that cannot be regarded as real.
Nothing exists until it is measured.
There are trivial truths and the great truths. The opposite of a trivial truth is plainly false. The opposite of a great truth is also true.