Man must spend much more time in extraordinary natural places to grasp much better how remarkable our planet is and to realise what a great privilege and what an enormous joy to be living here!

On the path to truth, you can't see many people; truth's way is calm and quiet. Look around you, friend! Are there too many people on the path you walk? If there are, question your path! Get away from the crowds!

Dwarfs have also the right to despise the giants, because giants too can be defeated!

Knowledge can protect you much better than a strong castle!

If you have live in the mud for a while, you must not resist being a frog for a while!

There is only one real purpose of a real revolution: To move forward!

He who observes the infinite horizons will see the dangers before others.