"I am a determinist. As such, I do not believe in free will. The Jews believe in free will. They believe that man shapes his own life. I reject that doctrine philosophically. In that respect I am not a Jew...
I believe with Schopenhauer: We can do what we wish, but we can only wish what we must. Practically, I am, nevertheless, compelled to act as if freedom of the will existed. If I wish to live in a civilized community, I must act as if man is a responsible being. I know that philosophically a murderer is not responsible for his crime; nevertheless, I must protect myself from unpleasant contacts. I may consider him guiltless, but I prefer not to take tea with him." - Albert Einstein
Addendum:
Also quoted as:
"I am a determinist, compelled to act as if free will existed, because if I wish to live in a civilized society I must act responsibly. I know that philosophically a murderer is not responsible for his crime, but I prefer not to take tea with him."
Keywords: we must act as if free will, sit beside murderer, philosophy, free will, Einstein