Depends on the atheist.
In my humble opinion (i.e. I speak only for myself), I believe that it is human nature to wish for a higher power (that is not to say all do, I'm simply asserting that it is human nature, like sleeping when you're tired). Even an atheist might call for his mommy when lost in the woods. I believe this is what drives the belief in God in humanity.
However, human nature != truth.
Because a human wants to believe there is a higher power does not mean there is one.
Even when the weakest atheist who, when the chips are down, prays for rescue, does not actually bring into existence something that does not exist.
Atheists merely recognize that reality does not conform to the needs of human nature.