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What is the essence of meditation?

One day Lin-chi was asked: What is the essence of meditation? Lin-chi came right down from his seat and taking hold of the questioner by the front of his robe, slapped his face, then let him go.

The questioner, of course, stood there stupefied.

Then Lin-chi laughed and said to him: Why don't you bow?

This woke him from his reverie, and when he was about to make a bow to the Master he had his first taste of meditation!

Please read this again and again and again, and if you do not have the same taste then slap your face yourself then laugh and bow down to yourself - and then you will have the same taste, surely!