"One of the penalties of an ecological education is that one
lives alone in a world of wounds.  Much of the damage inflicted
on land is quite invisible to laymen.  An ecologist must either
harden his shell and make believe that [this] is none of his
business, or he must be the doctor who sees the marks of death
in a community that believes itself well and does not want 
to be told otherwise."

--Aldo Leopold, from essay "The Round River".