What you find:

depends, mostly, on what you are looking for.

 Who is looking "Where" for "What?"

Map from "1493" by Charles Mann, inset from Curtiss Hoffman:

http://rockpiles.blogspot.com/2013/04/update-hoffman-lecture-on-site.html

Mangled quote from John Lubbock, who actually is quoted as saying:

  "What we see depends mainly on what we look for."  

http://wakinguponturtleisland.blogspot.com/2010/11/john-lubbock.html

And the Turtles we see depends on the ones we look for (I said that):

http://wakinguponturtleisland.blogspot.com/2011/09/what-turtles-we-see-depends-mainly-on.html

Lubbock also said: 

"Earth and sky, woods and fields, lakes and rivers, the mountain and the sea, are excellent schoolmasters, and teach some of us more than we can ever learn from books."