What do atheists think of death?

Why is death, and the alleged afterlife, so extensively discussed and birth is so hastily omitted? If, as religious people claim, we have been born by the will of god on a certain date, then the consequent ever-lasting spiritual life becomes a paradox. On one side of the equation we have a definite beginning(birthday) and on the other eternity(whatever eternity means to religious people). I know we are not supposed to seek logic in religion, but the author of the thread is presumably a believer, so maybe he/she can try to solve the paradox.