Kings also sleep; but the clever ones, with one eye open, just like dolphins and whales

Bird cage is nice only when it is empty!

When the sky is totally covered by the dark clouds, be strong enough to see the bright stars beyond them!

High positions are full of low people!

Your mind is your spirit; do not seek any other hidden soul inside you! All is in the brain! The depiction of a spirit rising to the sky is no more real than a medieval Scandinavian fairytales!

You may like walking barefoot, but keep your shoes with you; you may need it when the ground changes!

An idea can be greater than the Sun, because with an intelligent idea, man can discover the way to create another sun! Idea is the greatest power in this universe!