Life.

Life seems to happen quite frequently, consequently people seems to write about life-- a lot. Of course, Shakespeare's no slouch, so he wrote about life. Ehem. Basically death is part of life; death occurs in his tragedies...profound, right?
Well, there are several famous speeches in the tragedies that I'm thinking I'll use.

Macbeth says in his Tomorrow, and tomorrow, and tomorrow speech that "life is but a walking shadow" I know that's pretty morbid. BUT!!! I'll make it fun.

(insert insult-able person/animal/object here) "[Your] life is but a walking shadow!"
TADAAAA! =D

Y'all have fun throwing your melodramatic fits!