Thanksgiving can be a tough time of year for many Americans. “The worst moment for an atheist is when he is really thankful and has no one to thank,” G.K. Chesterton pointed out many years ago. These days, the holiday has two stumbling blocks that I see. The first is America’s growing secularization. The second is something evident even among many of the still-faithful: a failure to appreciate the abounding blessings we all enjoy. The answer to both is the same: Look up. Let’s take those in reverse order. In our deeply divided world, with impeachment hearings dominating our news...