“Whatever is formed of matter receives the most perfect form possible in that species of matter; in each individual case the defects are in accordance with that individual matter.”
Compare Gottfried Leibniz argument for the "best of all possible worlds" in his Essays on the Goodness of God, the Freedom of Man and the Origin of Evil
Ch.12
Guide for the Perplexed (c. 1190), Part III
Context: Galen, in the third section of his book, "The Use of the Limbs," says correctly that it would be in vain to expect to see living beings formed of the blood of menstruous women and the semen virile, who will not die, will never feel pain, or will move perpetually, or shine like the sun. This dictum of Galen is part of the following more general proposition:—Whatever is formed of matter receives the most perfect form possible in that species of matter; in each individual case the defects are in accordance with that individual matter.
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Maimónides 180
rabbi, physician, philosopher 1138–1204Related quotes
Pask (1975) The cybernetics of Human Learning and Performance. p. 222 as cited in: Andrew Ravenscroft (2003) "From conditioning to learning communities: implications of fifty years research in E-learning design".
Quoted in A Life of Azikiwe by K. A. B. Jones-Quartey (Penguin, 1965), p. 121

" Notebook C http://darwin-online.org.uk/EditorialIntroductions/vanWyhe_notebooks.html" (1838) page 210e http://darwin-online.org.uk/content/frameset?pageseq=186&itemID=CUL-DAR122.-&viewtype=side
quoted in
also quoted in
Other letters, notebooks, journal articles, recollected statements

Implosion Magazine, No. 71, p. 12 (Callum Coats: Energy Evolution (2000))
Implosion Magazine

There is one thinking sensible principle, intimately allied to one kind of organic matter—have & which thinking principle seems to be given a assumed according to a more extended relations of the individuals, whereby choice with memory or reason? is necessary—which is modified into endless forms bearing a close relation in degree & kind to the endless forms of the living beings.
" Notebook C http://darwin-online.org.uk/EditorialIntroductions/vanWyhe_notebooks.html" (1838) page 210e http://darwin-online.org.uk/content/frameset?pageseq=186&itemID=CUL-DAR122.-&viewtype=side
quoted in [Creativity, Psychology and the History of Science, 2005, Howard E., Gruber, Katja, Bödeker, Springer, 9781402034916, 142, http://books.google.com/books?id=MDbruQKIu-wC&pg=PA142]
also quoted in [The Cambridge Companion to Darwin, 2003, Robert J., Richards, Darwin on mind, morals, and emotions, Johnathan, Hodge, Gregory, Radick, Cambridge University Press, 9780521777308, 95-96, http://books.google.com/books?id=uj_by_Sg3LkC&pg=PA95]
Other letters, notebooks, journal articles, recollected statements

Source: Aphorisms and Reflections (1901), p. 226

“In the final analysis, in science, unlike art, the individual hardly matters.”