Korean Christianity has had close relationships with civil society and has achieved historical advancement through self-devotion and collected competencies. This study aimed to examine the activities of Christians, along with Minister Koh Young-geun, who resisted oppressive power in the 1980s and 1990s, and extract Christianity’s common values revealed through times. This study described that common values of Christian publicness, namely, transcendences, universality, relevance, practicality, and openness, are still the values that today’s Christianity should keep. The apocalyptic confession of faith and active practice of Koh Young-geun and his colleagues are based on people’s concrete life. The universality of justice and love was revealed to protect people’s right to live and respect life. The meetings of people out of public office, Fair Press Urging Clerical Association, and political prisoners release movement processes that avoid love without justice and justice without love, and the planned and practiced work through a democratic decision-making process showed openness that respects the opinions and views of all, including clerics and laypeople. Although the characteristics of the 1980s and 1990s were different, the fact that values representing both periods exist offer significant implications to a periodic task by which today’s Korean Christian publicness should be restored.