Theologian, philosopher, and rector of the University of Hamburg from 1960 until 1978.
He began his philosophy education in Erlangen, but he had to take a leave of absence because of issues with his thyroid.
He was personally received by former U.S. President Jimmy Carter during his lecture tour in the United States in 1977.
He was born in Wuppertal and died in Hamburg.
He also met with Billy Graham during his United States lecture tour.