Willi Ossa was an artist who worked as a janitor at night in a church on New York's West Side to support his wife and infant daughter. During the day he painted. German by birth, Willi grew up during the war years and then married an American girl, the daughter of an officer in the occupying army. I got to know Willi when I was a theological student working at the same church as an assistant pastor.

Willi liked to talk about religion; I liked to talk about art. We became friends. We got along well together and had long conversations. He decided to paint my portrait. I went to his house on West 92nd Street a couple of afternoons a week on my way to work at the church and sat for 30 minutes or so for my portrait. He never permitted me to see what he was painting. Day after day, week after week, I sat while he painted. One day his wife came into the room and looked at the portrait now nearing completion and exclaimed in outrage, "Krank, krank." I knew just enough German to know that she was saying, "Sick! You paint him to look like a corpse!"

He answered, "Nicht krank, aber keine Gnade"--"he's not sick; that is the way he will look when the compassion is gone, when the mercy gets squeezed out of him."

A few half-understood phrases were enough for me to guess correctly, without seeing the portrait, what Willi was doing. We had often argued late into the night about the Christian faith. He hated the church. He thought Christians were hypocrites--all of them. He made a partial exception for me for friendship's sake.

The Christians he had known had all collaborated with and blessed the Nazis. The Christians he had known were responsible for the death camps and the cremation of six million Jews. The Christians he had known had turned his beloved Germany into a pagan war machine. The word "Christian" was associated in Willi's experience with state church Christians who had been baptized and took communion and played Mozart all the while they led the nation into atrocities on a scale larger than anything the world had yet seen.

His argument was that the church squeezed the spirit and morality out of persons and reduced them to function in a bureaucracy where labels took the place of faces and rules took precedence over relationships. I would argue the other side. He would become vehement. Willi's English was adequate but not fluent; when he got excited he spoke German. "But there is no mercy in the church, keine Gnade, no compassion." He told me that I must never become a pastor. If I became a pastor, in twenty years I would be nothing but a hollow-eyed clerk good for nothing but desk work.

That was what he was painting by day without my knowing it: a prophetic warning. A portrait not of what I was right then, but of what he was sure I would become if I persisted in the Christian way.

I have the portrait. I keep it in a closet and take it out to look at from time to time. The eyes are flat and empty. The face is gaunt and unhealthy. I was never convinced that what he painted was certain to happen--if I had been, I would not have become a pastor--but I knew it was possible. I knew that before I met Willi Ossa. I knew it from reading Scripture and from looking around me. But his artistic imagination created a portrait that was far more vivid than any verbal warning. The artist has eyes to connect the visible and the invisible and the skill to show us complete what we in our inattentive distraction see only in bits and pieces. So I look at that portrait, then look into the mirror and compare.