No, he doesn't say that, but he is obviously rejecting the idea of an almighty being who could make you live beyond your mortal life.
Though you could argue that we don't know what happens after our mortal life, we could just carrying on living in some form or other.

His view could be said to be the rejection of all those things you cannot have a strong certainity in, which therefore results in his position to make something worthwhile of your life.