This study explored the life of the painter Sangki Son who died at the age of 39 and the healing aspects of the existential meaning in his representative paintings. Son, born in Yeosu, a coastal city, was physically handicapped and weak in his childhood, which was traumatic to him. This trauma led him to an outsider's life. He regarded himself as an isolated outsider in existential danger. His literary philosophy and visual writing cast a harsh criticism on himself and the reality. This study inquired into the meanings found in his works and the influences of his ideas and attitudes on his works, based on Colin Wilson's outsider theory and Victor E. Frankl's logotherapy. His self-image and view of life were consistently reflected in the paintings such as , , and . These works were not only an artistic achievement showing the sublimation of the tensions and neurosis in real life but also a case showing the subconscious healing effects of art therapy. The act of painting was his own way of surviving in itself rather than an alternative to something. Healing took place as he expressed his true inner self in the paintings. Through the analysis of Son's life and works, this study shed light on his way of curing the hurt inner self and expressing the shadows and anima in him to reach his true self, and on the strong and unique existential meaning of art as therapy expressed in his works.