The psychiatrist who survived Auschwitz and formulated a theory on the meaning
of life. http://www.ship.edu/~cgboeree/frankl.html
I read some of his books a decade ago during a personally difficult time. It
was pretty powerful and uplifting. His theory is much less than a complete
system (like Freud and Jung's), but it focusses on the kind of trouble you
described.
