The wisest minds are those who refuse all the negative inevitabilities!

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!

Open the door by yourself instead of waiting the door to be opened by itself!

Are you looking for gold, friend? Look around you; anything useful to you is pure gold, pure silver!

There are two kinds of science: The black science and the white science. The science of weapon production is the black one. Working in this category of science is a great betrayal to humanity!

Happiness is the summit of a high mountain; we can visit it, but we can't stay there! We are forced to go down to the valleys of sadness.

If you want to give an advice to someone, you must first be somebody.