" My claim is that if there is no God, then meaning, value, and purpose are ultimately human illusions. They’re just in our heads. If atheism is true, then life is really objectively meaningless, valueless, and purposeless, despite our subjective beliefs to the contrary. This point is worth underscoring, since it’s so frequently misunderstood. I’m not saying that atheists experience life as dull and meaningless, that they have no personal values or lead immoral lives, that they have no goals or purpose for living. On the contrary, life would be unbearable and unlivable without such beliefs. But my point is that, given atheism, these beliefs are all subjective illusions: the mere appearance of meaning, value, and purpose, even though, objectively speaking, there really isn’t any. If God does not exist, our lives are ultimately meaningless, valueless, and purposeless despite how desperately we cling to the illusion to the contrary. "

― William Lane Craig , On Guard: Defending Your Faith with Reason and Precision