The practice of true reality
Is simply to sit serenely
In silent introspection.
When you have fathomed this,
You cannot be turned around
By external causes and conditions.
This empty, wide-open mind
Is subtly and correctly
Illuminating.

HongZhi Zhengjue (1091 CE-1157 CE), Hong Zhi Zhengjue was an important Chinese Chan Buddhist monk who authored or compiled several influential texts.