When Sook was young, she saw a pretty bird on the mountain but bird quickly flew away, leaving only sound behind. She looked up in the sky to find the bird, but all she could see was tree branches and forest. The bird kept on singing, but she had no idea where it was. From very young, bird was the tree branches and big forest to her. This experience made her to visualize the sound of birds like forest. The sound of bird relaxes mind and body. This caught her attention, and she combined this with mandala, which visually represents healing and meditation.