How wonderful that we have met with a paradox. Now we have some hope of making progress.
And anyone who thinks they can talk about quantum theory without feeling dizzy hasn't yet understood the first thing about it.
Some things are so serious, they can only be joked about.
Prediction is very difficult, especially if it's about the future.
Sometimes the child in one behaves a certain way and the rest of oneself follows behind, slowly shaking its head.
The opposite of every great idea is another great idea.