Morality without religion is only a kind of dead reckoning - an endeavor to find our place on a cloudy sea by measuring the distance we have run but without any observation of the heavenly bodies.
I also take pleasure in the so-called negative power in Grotjahn's work. That is I love his paintings for what they are not. Unlike much art of the past decade Grotjahn isn't simply working from a prescribed checklist of academically acceptable curator-approved 'isms' and twists.