“For loveliness
Needs not the foreign aid of ornament,
But is when unadorned adorned the most.”
Source: The Seasons (1726-1730), Autumn (1730), l. 208-210.
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James Thomson (poet) 50
Scottish writer (1700-1748) 1700–1748Related quotes

“Who seems most hideous when adorned the most.”
Che quant' era più ornata, era più brutta.
Canto XX, stanza 116 (tr. W. S. Rose)
Compare:
Beauty when most unclothed is clothed best.
Phineas Fletcher, Sicelides (1614), Act II, scene iv
In naked beauty more adorned,
More lovely than Pandora.
John Milton, Paradise Lost (1674), Book IV, line 713
For Loveliness
Needs not the foreign aid of ornament,
But is, when unadorned, adorned the most.
James Thomson, The Seasons, "Autumn" (1730), line 204
Orlando Furioso (1532)

“Beauty least adorned is most adorned”
Source: Aphorisms and Reflections (1901), p. 35

Kitáb-i-`Ahd http://reference.bahai.org/en/t/b/TB/tb-16.html (Book of the Covenant)

Source: The Works of Mr. Alexander Pope (1717), Elegy to the Memory of an Unfortunate Lady, Line 51.

Letter to John Wilson Croker (29 December 1835), quoted in L. J. Jennings (ed.), The Croker Papers: The Correspondence and Diaries of the Late Right Honourable John Wilson Croker, LL.D., F.R.S., Secretary to the Admiralty from 1809 to 1830, Vol. II (1884), p. 288