The study aims to indicate how the lives of religious people can serve as a source of theological knowledge and beliefs. This study engages the life and work of Hannes Adonis through the methodology of biography as theology. A key characteristic of Hannes Adonis's life and work is the dismantling of all walls of division in church and academia. First, the methodology of biography as theology is discussed. Secondly, Adonis’s contribution to the Dutch Reformed Mission Church (DRMC)/Uniting Reformed Church in Southern Africa (URCSA) is engaged. Thirdly, Adonis’s impact on academia, particularly the South African historiography, is discussed.