What did Martin Luther become and what did he faithfully follow

I wasn't sure if you were meaning martin Luther king jr, or martin Luther the German professor, so I included both.

Martin Luther was a German professor of theology, composer, priest, Augustinian monk, and a seminal figure in the Protestant Reformation. Luther was ordained to the priesthood in 1507.

Martin Luther King Jr. sought to raise the public consciousness of racism, to end racial discrimination and segregation in the United States. In 1955, King became involved in his first major civil rights campaign in Montgomery, Alabama, where buses were racially segregated.