The Nazis arrested Dietrich Bonhoeffer in 1943 for his work with the resistance. He had been warned not to speak publicly. He did anyway. They hung him in April of 1945. The book Ethics is a gathering of his notes for a book he intended to write on the subject. The notes were hidden away from the police in a garden. Here is a quote from it:
"Christ did not, like a moralist, love a theory of good, but He loved the real man. He was not, like a philosopher, interested in the 'universally valid,' but rather in that which is of help to the real and concrete human being. What worried him was not, like Kant, whether the 'maxim of an action can become a principle of general legislation', but whether my action is at this moment helping my neighbor become a man before God."