“I do not believe in a God who maliciously or arbitrarily interferes in the personal affairs of mankind. My religion consists of a humble admiration for the vast power which manifests itself in that small part of the universe which our poor, weak minds can grasp!”

Source: Attributed in posthumous publications, Albert Einstein: The Human Side (1979), p. 66 of the 1981 edition

As quoted in The Private Albert Einstein (1992) by Peter A. Bucky and Allen G. Weakland, p. 86
Attributed in posthumous publications

Source: Reason and Hope: Selections from the Jewish Writings of Hermann Cohen (1971), p. 52

Albert Einstein, Princeton, 26 April 1947
A - F

As quoted in Introduction to Philosophy (1935) by George Thomas White Patrick and Frank Miller Chapman, p. 44
Variant translations:
I am satisfied with the mystery of life's eternity and with a knowledge, a sense, of the marvelous structure of existence — as well as the humble attempt to understand even a tiny portion of the Reason that manifests itself in nature.
Enough for me the mystery of the eternity of life, and the inkling of the marvellous structure of reality, together with the single-hearted endeavor to comprehend a portion, be it never so tiny, of the reason that manifests itself in nature.
1930s, Mein Weltbild (My World-view) (1931)

Letter to an atheist (24 March 1954), p. 43
Attributed in posthumous publications, Albert Einstein: The Human Side (1979)

Gesammelte Mathematische Werke (1876)

As quoted in A life of Linnaeus https://archive.org/stream/lifeoflinnaeus00brigiala#page/122/mode/2up/search/blessed (1858), by J. Van Voorst & Cecilia Lucy Brightwell, London. p. 123.: I render thanks to the Almighty, who has ordered my lot so that I live at this day; and live, too, happier than the King of Persia. I think myself thus blessed because in this academic garden I am principal. This is my Rhodus, or, rather, my Elysium; here I enjoy the spoils of the East and the West, and, if I mistake not, that which far excels in beauty the garments of the Babylonians and the porcelain of China. Here I behold myself the might and wisdom of the Great Creator, in the works by which He reveals Himself, and show them unto others."
Context: I thank Providence who has guided my destinies, that I now live; nay, that I live happier than a king of Persia. You know, fathers and fellow-citizens, that I am wholly occupied with this academical garden; that it is my Rhodus, or rather my Elysium. There I possess all the spoils of the east and the west which I wished for; and which, in my belief, are far more precious than the silken garments of the Babylonians, and the porcelain vases of the Chinese. There I receive and convey instruction. There I admire the wisdom of the Creator, which manifests itself in so many various modes, and demonstrate it to others.

Tablet to the First Letter of the Living