Source: Darwin, God and the Meaning of Life: How Evolutionary Theory Undermines Everything You Think You Know (2010), p. 101
“From the standpoint of exact natural science, of the explanation of nature from causes, the assumption of an earth-soul is… an hypothesis for the explanation of Being and of the historical development of the organic world.”
Gesammelte Mathematische Werke (1876)
Help us to complete the source, original and additional information
Bernhard Riemann 43
German mathematician 1826–1866Related quotes

“Every explanation is after all an hypothesis.”
Source: 1930s-1951, Philosophical Occasions 1912-1951 (1993), Ch. 7 : Remarks on Frazer's Golden Bough, p. 123

Introduction
Popular Astronomy: A Series of Lectures Delivered at Ipswich (1868)
This was his concept of pattern prediction, or explanation of the principle, broad, general predictions.
Hayek's Journey: The Mind of Friedrich Hayek (2003)
Source: 1930s, Modern Theory of Development, 1933, 1962, p. 29

Letter to Legendre (July 2, 1830) in response to Fourier's report to the Paris Academy Science that mathematics should be applied to the natural sciences, as quoted in Science (March 10, 1911) Vol. 33 https://books.google.com/books?id=4LU7AQAAMAAJ&pg=PA359, p.359, with additional citations and dates from H. Pieper, "Carl Gustav Jacob Jacobi," Mathematics in Berlin (2012) p.46