Nangaku and the tile...

One day when Nangaku came to Baso's hut, Baso stood up to receive him. Nangaku asked him, "What have you been doing recently?"

Baso replied, "Recently I have been practicing Zazen exclusively."

Nangaku asked, "And what is the aim of your Zazen?"

Baso replied, "The aim of my Zazen is to achieve Buddhahood."

Thereupon, Nangaku took a roof tile and began rubbing it on a rock near Baso's hut.

Baso, upon seeing this, asked him, "Master, what are you doing?"

Nangaku replied, "I am polishing a tile."

Baso then asked, "What are you going to make by polishing a tile?"

Nangaku replied, "I am polishing it to make a jewel."

Baso said, "How can you possibly make a jewel by rubbing a tile?"

Nangaku replied, "How can you possibly make yourself into a Buddha by practicing Zazen?"