On Memorial Day, we honor those soldiers who gave their lives for our country. In the Gettysburg Address, perhaps the greatest reflection in our history on such sacrifice, Abraham Lincoln refers to the fallen soldiers as having given “the last full measure of devotion.” In our nation’s present crisis, we can learn from the devotion of which Lincoln spoke more than 150 years ago. Speaking after the Union had won a decisive battle, he begins his address by saying: “Fourscore and seven years ago our fathers brought forth, on this continent, a new nation, conceived in liberty, and dedicated to the proposition that all men are created equal. Now we are engaged in a great civil war, testing whether that nation, or any nation so conceived, and so dedicated, can long endure.” This Memorial Day we are, thankfully, not fighting a civil war, but we are nonetheless engaged in a …