“The oneness of God’s Creativity is to affirm and recognise that God is the sole creator, master and owner of everything that exists. God is the One who sustains, takes care of, and nourishes everything. According to the Islamic doctrine of tawheed, anyone who denies this has associated partners with God, which is polytheism (known as shirk in Islamic theology). Anyone who believes that these descriptions of God can be shared by any created thing has deified that thing. Therefore, they have associated partners with God.”

XIII. How things eternal are said to be made.
On the Gods and the Cosmos
Context: Those who believe in the destruction of the world, either deny the existence of the Gods, or, while admitting it, deny God's power.
Therefore he who makes all things by his own power makes all things subsist together with himself. And since his power is the greatest power he must needs be the maker not only of men and animals, but of Gods, men, and spirits. And the further removed the first God is from our nature, the more powers there must be between us and him. For all things that are very far apart have many intermediate points between them.

"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.

1900s, God Does Not Exist (1904)

The Fall (1956)

Source: The Lathe of Heaven (1971), Chapter 7 (Heather)

Source: Attributed in posthumous publications, Einstein and the Poet (1983), p. 132
Variant transcription from "Death of a Genius" in Life Magazine: "I cannot accept any concept of God based on the fear of life or the fear of death, or blind faith. I cannot prove to you that there is no personal God, but if I were to speak of him I would be a liar."
Context: About God, I cannot accept any concept based on the authority of the Church. As long as I can remember, I have resented mass indoctrination. I do not believe in the fear of life, in the fear of death, in blind faith. I cannot prove to you that there is no personal God, but if I were to speak of him, I would be a liar. I do not believe in the God of theology who rewards good and punishes evil. My God created laws that take care of that. His universe is not ruled by wishful thinking, but by immutable laws.

Words spoken by an actor portraying Young in the movie September Dawn, an account of the Mountain Meadows massacre. This exact statement has not been attributed to a known source, and may be a paraphrase of a statement made by Young on March 2, 1856: "The time is coming when justice will be laid to the line and righteousness to the plummet; when we shall take the old broad sword and ask, "Are you for God?" and if you are not heartily on the Lord's side, you will be hewn down." (Journal of Discourses 3:226)
Misattributed

An Interview with Dr. Leo Igwe — Founder, Nigerian Humanist Movement (2017)

Dalá’Il-I-Sab‘ih