To raise new questions, new possibilities, to regard old problems from a new angle, requires creative imagination and marks real advance in science.

The only justifiable purpose of political institutions is to ensure the unhindered development of the individual.

Time is not at all what it seems. It does not flow in only one direction, and the future exists simultaneously with the past.

I asked myself childish questions and proceeded to answer them.

What good is a reputation not put to good use.

Wisdom is not a product of schooling but of the lifelong attempt to acquire it.

Marvellous, what ideas the young people have these days. But I don't believe a word of it.