Practice is the best of all instructors.

There's no justice in this world.

In case of fire, stand in the hall and shout "Fire!"

We know next to nothing about virtually everything. It is not necessary to know the origin of the universe; it is necessary to want to know. Civilization depends not on any particular knowledge, but on the disposition to crave knowledge.

If we don't survive, we don't do anything else.

No house should ever be on any hill or on anything. It should be of the hill, belonging to it.