Even before I had had time to really think things through, I realized we must not forget. If all of us forgot, the same thing might happen again, in 20 or 50 or 100 years.

None of my 'clients' - not Eichmann, not Stangl, not Mengele, and not even Hitler or Stalin - was born a criminal. Somebody had to teach them to hate: maybe the society, maybe the politics, maybe just a Jewish prostitute.

For your benefit, learn from our tragedy. It is not a written law that the next victims must be Jews. It can also be other people.

There is no denying that Hitler and Stalin are alive today... they are waiting for us to forget, because this is what makes possible the resurrection of these two monsters.

Humour is the weapon of unarmed people: it helps people who are oppressed to smile at the situation that pains them.

Tolerance and human rights require each other.

The combination of hatred and technology is the greatest danger threatening mankind.