I can't go on, I'll go on.

I am so clever that sometimes I don’t understand a single word of what I am saying.

I believe it's important to have a passion for what you do. If you don't have a passion, you won't have the energy to keep going when things get tough.

The only way to learn mathematics is to do mathematics.

I keep thinking about this river somewhere, with the water moving really fast. And these two people in the water, trying to hold onto each other, holding on as hard as they can, but in the end it’s just too much. The current’s too strong. They’ve got to let go, drift apart.

"Die Vergangenheit ist nie tot, sie ist nicht einmal vergangen."

Lonely people have their own bog.