God is dead, man to follow.
Man is not a rational creature, rather he is a rationalizing one.
No truth exists behind morality, it is the collective delusion. It is what remain of religion when faith is gone. A rotting corpse of God.
From "Of Human Bondage", in my opinion best work by Maugham,
Phillip's philosophy was "follow your inclinations with due regard to the
policeman around the corner."