"One Touch of Nature Makes the Whole World Kin." - Shakespeare Misapplied
[The accepted understanding:
"One touch of nature makes the whole world kin,
That all with one consent praise new-born gawds,"
Troilus And Cressida Act 3, scene 3, 169–179
Most agree that "touch of nature" means "natural trait" - an essential characteristic that makes us all kin. Ulysses, author of the phrase, addresses his fellow Greek/warrior Achilles, who has been sitting out the Trojan War on account of wounded pride. Ulysses, hoping to goad his compatriot back into action, delivers an unflattering lecture on human nature. Our "touch of nature" isn't warmth or generosity. Ulysses finds unanimity only in our prizing superficial novelties ("new-born gawds").]