If you see a lonely tree in the middle of nowhere, plant a tree next to it!

There exists no greater megalomania than thinking that we are all alone in this cosmic ocean!

No wise man is ever interested in stupid matters like wars! Wars are always on the agenda of only stupid man!

The wisdom of the Moon is greater than the wisdom of the Earth, because the Moon sees the universe better than the Earth can see it!

Without curiosity, all doors remain closed!

For humans as well as for ships, dark stormy nights are better teachers than tranquil sunny days.

When you reached the summit, you will see that you are still tiny!