You should pay more attention! :-P
John Doe explains each of the sins he's done up until now in the car: http://www.youtube.com/watch?v=rS4EJGh9mIg#t=0m30s
(PRIDE: The model is given a choice after having her face mutilated. Phone an ambulance or take an overdose. Her pride makes her take an overdose.)
He has two left by that time, Envy and Pride.
ENVY: John Doe tells Detective Mills how much he admires him and his wife for the life they've made for themselves: http://www.youtube.com/watch?v=1giVzxyoclE#t=1m06s
WRATH: Is when Detective Mills shoots John Doe for mailing him his wife's head: http://www.youtube.com/watch?v=1giVzxyoclE#t=4m00s
They're not the strongest cases, but then, John Doe was pretty nuts.