i might get razzed for this
but oddly enough, a really sound answer for atheist values popped up in the tv series, Angel.

a person he was working with, a cop, lost her father, an ex cop, to a vampire attack.  he was crooked, but she did not realize that.  she had just been coming around to seeing the supernatural, and developed an intense hatred of vampires because of the death.

then she found out angel was a vampire, and went after him unsuccessfully.  she became suicidal and took a lot of pills to kill herself.  angel found out and busted into her apartment, force fed her coffee and kept her stimulated in the shower.

afterwords, they had that discussion.  his take on a universe that might not have god was like this:

"if there is no afterlife, if this right here is all there is, what do you choose to do?  do you choose to live your life to help others or do you live in selfishness?  if this is all there is, then the choice you make is actually far more important.  living life unselfishly when that is all that is left is an even more important gift."

that's paraphrased.  i was was really surprised at that popping up in that show.

go that way really fast.
if something gets in your way
turn