A monk asked Yakusan Igen-zenji, “I have a problem. Would you please solve it for me?”
Yakusan said, “Come in the evening. I will solve your problem.”
That evening, all the monks gathered in the Dharma Hall. Yakusan addressed them: “Is there anyone here who needs to solve a problem?”
The monk approached Yakusan. Yakusan descended the platform, seized him and said, “Everybody, look at him! He has a problem!” Yakusan pushed the monk away and returned to his quarters.
What Yakusan did seems rough, but if you examine his action carefully, his answer was perfectly matching. Even if all the buddhas of the three worlds came out, not one could change it. Why is this so? This monk has a problem. If he cannot solve it by himself, let him look at the peak of the mountain where clouds are floating. Let him look at the river where the water is rushing quickly.