From "Mending Wall", by Robert Frost:

Before I built a wall I'd ask to know
What I was walling in or walling out

From "Doing Without", by David Ray:

Doing without
is a great protector of reputations
since all places one cannot go
are fabulous, and only the rare and
enlightened plowman in his field
or on his mountain does not overrate
what he does not or cannot have.

Clarinda Harriss:

The Tragedy of Hats is that you can never see the one you're wearing,
that no one believes the lies they tell,
that they grow to be more famous than you,
that you could die in one but you won't be buried in it.