When a trout rising to a fly gets hooked on a
line and finds himself unable to swim about
freely, he begins with a fight which results
in struggles and splashes and sometimes an
escape. Often, of course, the situation is
too tough for him. In the same way the human
being struggles with his environment and with
the hooks that catch him. Sometimes he masters
his difficulties; sometimes they are too much
for him. His struggles are all that the world
sees and it naturally misunderstands them. It
is hard for a free fish to understand what is
happening to a hooked one.

(Karl A. Menninger)