Common hypocrites pass themselves off as doves; political and literary hypocrites pose as eagles. But don't be fooled by their eagle-like appearance. These are not eagles, but rats or dogs.

Calculating selfishness is the annihilation of self.

A tree is beautiful, but what's more, it has a right to life; like water, the sun and the stars, it is essential. Life on earth is inconceivable without trees. Forests create climate, climate influences peoples' character, and so on and so forth. There can be neither civilization nor happiness if forests crash down under the axe, if the climate is harsh and severe, if people are also harsh and severe. ... What a terrible future!

If our life has a meaning, an aim, it has nothing to do with our personal happiness, but something wiser and greater.

Oh, I have now a mania for shortness. Whatever I read - my own or other people's works - it all seems to me not short enough.

One must be a god to be able to tell successes from failures without making a mistake.

One can prove or refute anything at all with words. Soon people will perfect language technology to such an extent that they'll be proving with mathematical precision that twice two is seven.