We can easily forgive a child who is afraid of the dark. The real tragedy of life is when men are afraid of the light --Plato

The tragedy of life is not that it ends so soon, but that we wait so long to begin it --Unknown

 Life is a tragedy for those who feel, but a comedy to those who think. --Horace Walpole

The courage of life is often a less dramatic spectacle than the courage of the final moment; but it is no less a magnificent mixture of triumph and tragedy A man does what he must-in spite of personal consequences; in spite of obstacles and dangers and pressures-and that is the basis of all morality. --John Fitzgerald Kennedy

http://www.utm.edu/research/iep/t/tragedy.htm

Tragedy

http://depthome.brooklyn.cuny.edu/classics/dunkle/studyguide/tragedy.htm

Introduction to Greek Tragedy

http://www.classics.cam.ac.uk/Faculty/trag-theory.html

Tragedy & Philosophy

http://www.classics.cam.ac.uk/Faculty/tragedy.html

Greek Tragedies

http://www.stemnet.nf.ca/~hblake/tragedy1.html

History of Greek Tragedy