Another poet I've been paying some attention to lately is Archibald MacLeish. Googling around, I found these quotes by him on Wikipedia. I like them:
"We are deluged with facts, but we have lost or are losing our human ability to feel them".
"What is more important in a library than anything else — is the fact that it exists".
"A man who lives, not by what he loves but what he hates, is a sick man".