'The Seven Cups of Tea' - Lu Tong (798-835 AD)

The first cup refreshes your lips and throat,
The second elates you from your lonely mood,
The third searches in your arid intestines* and you realize that you have only 5,000 volumes of literature in your memory,
The fourth makes you perspire lightly, and evaporate through your skin the pent-up grievances in your life,
The fifth causes you to feel your muscles are relaxing, and bones losing weight,
The sixth leads you to go on the path to meet fairies,
Oh! The seventh cup! Better not take it! If you had it, the only feeling is an air current passing under your armpits.
* 'searches in your arid intestines' equates to 'makes you rack your brains'