Light, the solemn sound of silence.Park, Choong Heum’s ‘Mountain-The Gate of Sky,’ placed in the center of the Sky Park, Seoul, makes the audience meet themselves on the untrodden path and strains their ears to the sound in their mind. Leaning on the deep winding valleys and standing under the rose window skylight, the light penetrates to the body and recalls forgotten times. The light emerging from cracks penetrates their bodies and reflects a shadow on the wall. It is the moment of becoming unified with nature and the human with the light. In the scene, once they let their body to stay in the magnificent space and stillness, it opens a door to the new world. It embraces their tired body with warm light and leads to a primitive time.