Atheist standard of morality

“Of course, the nonexistence of God is nothing more than a nonsense option. The categories of good and evil themselves require some sort of transcendent standard. What makes things good? What makes things evil? Atheists have, by and large, given up on the idea of an absolute standard of morality. After all, spiritual emptiness and the nonexistence of anything outside of the simple material universe fundamentally relative. It takes on (to be generous) the same authority as Wisconsin speed limits on a Nevada highway at night” (N. D. Wilson, Notes From The Tilt-A-Whirl: Wide-Eyed Wonder in God’s Spoken World).