We all try to escape pain and death, while we seek what is pleasant.

E=mc2. Energy equals mass times the speed of light squared. The original statement is: If a body gives off the energy L in the form of radiation, its mass diminishes by L/c2. Ist die Tragheit eines Korpers von Seinem Energieghalt Abhangig? 1905

For the most part we humans live with the false impression of security and a feeling of being at home in a seemingly familiar and trustworthily physical and human environment. But when the expected course of everyday life is interrupted, we realize that we are like shipwrecked people trying to keep their balance on a miserable plank in the open sea, having forgotten where they came from and not knowing whether they are drifting. But once we fully accept this, life becomes easier and there is no longer any disappointment.

Never do anything against conscience even if the state demands it.

I don't know what weapons will be used in the Third World War. But I can tell you what they'll use in the Fourth - rocks!

A human being is part of a whole called by us the universe.

Do not worry about your difficulties in Mathematics. I can assure you mine are still greater.