according to rabbinic tradition, bewails the vanity of all human effort.

Classical antiquity

Protagoras made the famous claim that humans are "the measure of all things; of what is, that it is; of what is not, that it is not". Socrates advocated the ancient adage for all humans to "Know thyself", and gave the (doubtlessly tongue-in-cheek) definition of humans as, "featherless

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