Expansion on the upward tendency

Without water grass cannot grow. Under water grass does not grow. Our physical body is like a blade of grass holding up a dew-drop, for a little while.

Fukan-zazen-gi says SORO no GOTOKU. SO means grass. RO means dew. GOTOKU means like.

The Buddha’s teaching is SHOYOKU CHISOKU, having small wants, know satisfaction.

A person might be mistaken who was so hungry for the truth of Zazen that he neglected his own thirst. Without a moderate amount of water, nothing grows.

Again, Fukan-zazen-gi says ONJIKI SETSU ARI. ON means drink. JIKI means food. SETSU means economy. ARI means there is. There is economy in drink and food -- food and drink are taken in moderation.