Listening to a series of excellent dharma talks from the San Francisco Zen Center, I first learned about the ancient poem “Trust in Mind”^[Full text of the poem, “Xinxinming”.] by the Third Ancestor of the Zen tradition, Jianzhi Sengcan (鑑智僧璨)

It captures beautifully, even in translation, the essence of Zen.

“The Perfect Way is only difficult for those who pick and choose;
Do not like, do not dislike; all will then be clear.
Make a hairbreadth difference, and Heaven and Earth are set apart;
If you want the truth to stand clear before you, never be for or against."