As our circle of knowledge expands, so does the circumference of darkness surrounding it.

[When asked "Dr. Einstein, why is it that when the mind of man has stretched so far as to discover the structure of the atom we have been unable to devise the political means to keep the atom from destroying us?"] That is simple, my friend. It is because politics is more difficult than physics.

I get the most joy in life out of music.

The illusion that we are separate from one another is an optical delusion of our consciousness.

I am an adherent of the ideal of democracy, although I well know the weaknesses of the democratic form of government. Social equality and economic protection of the individual appeared to me always as the important communal aims of the state. Although I am a typical loner in daily life, my consciousness of belonging to the invisible community of those who strive for truth, beauty, and justice has preserved me from feeling isolated.

Life is like a bicycle; keep moving on to maintain balance.

I never think of the future. It comes soon enough. When visiting the U.S. from Germany for a winter academic stay.