(This one is extra special to me. It was written on a plaque outside a chapel in the woods where I used to go camping).

And Nature, the old nurse, took
  The child upon her knee,
Saying: “Here is a story-book
  Thy Father has written for thee.” 

“Come, wander with me,” she said,
  “Into regions yet untrod;
And read what is still unread
  In the manuscripts of God.”

–Henry Wadsworth Longfellow (from The Fiftieth Birthday of Agassiz)