Not everything that can be extracted appears in anthologies of quotations, in commonplace books, or on the back of Celestial Seasonings boxes. Only certain sorts of extracts become quotations.

We sometimes think of quotations as extracts from larger texts, but some quotations originated complete unto themselves.

A single gnomic line can come to resonate with centuries of subsequent wisdom.

Not everything that can be extracted appears in anthologies of quotations, in commonplace books, or on the back of Celestial Seasonings boxes. Only certain sorts of extracts become quotations.

Reframing an extract as a quotation constitutes a kind of coauthorship. With no change in wording, the cited passage becomes different. I imagine that the thrill of making an anthology includes the opportunity to become such a coauthor.

An anthology of quotations is a museum of utterances.

Some lines are born quotations, some are made quotations, and some have "quotation" thrust upon them.