Ruiyan calls master

Every day Ruiyan called out to himself, "Master!" and answered, "Yes!" "Are you awake?" "Yes!"

The Gateless Gate, case 12

How to sit with it

Try it once today, quietly. Call yourself, and answer.

Read it once more, slowly. Then sit for two minutes and let it stay in the background. There is nothing to solve. New to this? Read what a koan is.