The old phrases 'Wol-In-Chun-Kang-Ji-Kog', one of the important topics of 'Son'(the religious meditation), means that 'the moon sheds light over one thousand rivers'. The moon is most scenic when it flows on nightly rivers. There is a different moon in each of the rivers. Though the moon being one, the moon on the river looks so different dependingon who watches it and how the person feels it; sad moon, beautiful moon, exciting moon, etc. Any stone scattered by the riverside might be another moon that reflects the feeling of the person.