There's a diversity of opinion, much of it religious. Some of it even says that I can be good as an atheist because of god.
Thankfully there are some more sensible comments, such as this from Paula Kirby (she lives in Scotland):
".. it is the myth that religious belief is somehow necessary for morality that is providing the life support for religion in many Western societies, long after we should have been reaching for the embalming fluid. "
The question of whether there is an absolute morality is an interesting one, indeed organised religion has changed its rules of morality over the years, mainly to fit in with accepted norms. Religion can teach good morals, however there are a large number of secular people who do far better at behaving well.