Quotations by:
Clarke, Arthur C.
The Universe appears to be a device contrived for the perpetual astonishment of astronomers.
Arthur C. Clarke (1917-2008) British writer
How the World Was One: Beyond the Global Village, Part 4, ch. 27 (1992)
(Source)
A number of variants can be found, e.g., "I sometimes think the universe is a machine designed for the perpetual astonishment of astronomers" or "The universe: a device contrived for the perpetual astonishment of astronomers." The above is the only one I could find from a source by Clarke himself.
When a distinguished but elderly scientist states that something is possible, he is almost certainly right. When he states that something is impossible, he is very probably wrong.
The greatest tragedy in mankind’s entire history may be the hijacking of morality by religion.
Arthur C. Clarke (1917-2008) British writer
Essay (1990), “Credo,” Living Philosophies [ed. Clifford Fadiman] (1990 ed.)
(Source)
Later collected in Greetings Carbon-Based Bipeds!: Collected Essays 1934-1998, Part 5, No. 10 (1999).

