Bai Juyi (772–846 / Taiyuan, Shanxi)

Don't think of the past;
It only awakens painful regrets.
Don't think of the future;
It paralyzes with uncertain longings.
Better by day to sit like a sack in your chair;
Better by night to lie like a stone in your bed.
When food comes-open your mouth.
When sleep comes-shut your eyes.