The Eternal (&c.)

"It is presented right to your face, and at this moment the whole thing is handed over to you. Look into your whole being. Let your body and mind be turned into an inanimate object of nature like stone or a piece a wood; when in a state of perfect motionlessness, an awareness is attained. All the signs of life will depart, and also every trace of limitation will vanish. Not a single idea will disturb your consciousness, when all of a sudden you will come to realize a light abounding in full gladness."

- Yengo (1566-1642)

I've never read a description that better accords with my own experience.

Via Daily Zen Meditation.