Lu Yu

The best quality tea must have the creases like the leather boots of Tartar horsemen, curl like the dewlap of a mighty bullock, unfold like a mist rising out of a ravine, gleam like a lake touched by a zephyr, and be wet and soft like earth newly swept by rain.

Its liquor is like the sweetest dew from Heaven.

Tea tempers the spirit and harmonizes the mind; dispels lassitude and relieves fatigue, awakens thought and prevents drowsiness.

Its goodness is a decision for the mouth to make.