“I talk about the gods, I am an atheist. But I am an artist too, and therefore a liar. Distrust everything I say. I am telling the truth.”

Source: The Wise Man's Fear

Letter to Guy H. Raner Jr. (2 July 1945), responding to a rumor that a Jesuit priest had caused Einstein to convert to Christianity, quoted in an article by Michael R. Gilmore in Skeptic magazine, Vol. 5, No. 2 (1997)
1940s

Source: Revelations of Divine Love

Here Comes There Goes You Know Who (1961)

"How to Love God" (12 September 1954).
General sources
Context: When I say I am the Avatar, there are a few who feel happy, some who feel shocked, and many who hearing me claim this, would take me for a hypocrite, a fraud, a supreme egoist, or just mad. If I were to say every one of you is an Avatar, a few would be tickled, and many would consider it a blasphemy or a joke. The fact that God being One, Indivisible and equally in us all, we can be nought else but one, is too much for the duality-conscious mind to accept. Yet each of us is what the other is. I know I am the Avatar in every sense of the word, and that each one of you is an Avatar in one sense or the other.
It is an unalterable and universally recognized fact since time immemorial that God knows everything, God does everything, and that nothing happens but by the Will of God. Therefore it is God who makes me say I am the Avatar, and that each one of you is an Avatar. Again, it is He Who is tickled through some, and through others is shocked. It is God Who acts, and God Who reacts. It is He Who scoffs, and He Who responds. He is the Creator, the Producer, the Actor and the Audience in His own Divine Play.

Friedrich Nietzsche, quoted in Walter Kaufmann, Nietzsche: Philosopher, Psychologist, Antichrist (1950)
M - R