"So many worlds, so much to do ... such things to be." —Alfred, Lord Tennyson.  From Hollins College's 1968 yearbook.

You've heard that you're part of all you've met, but here's the actual mathematics of it.  From Lambuth's 1959 yearbook.

Reblog if the Roman numeral at the top of the poem doubles as the answer to the rhetorical question.  From the Elson Primary School Reader, Book One, 1913.

Just shy of four decades before Alice went through the looking glass, some knights came riding "thro' the mirror blue" in Tennyson's "The Lady of Shalott."  Actually, going through mirrors was an old pantomime gag by Harlequin, as mentioned decades even earlier in The London Magazine, 1822.