In Samadhi one is alert. In Samadhi one is aware and quiet, quiet and aware. The mind is quiet but not dead quiet, it is aware. Samadhi resembles a fire which is nearly extinguished but retains the seed of flame in its ash. When the phenomena of awareness and quietness are conjoined there is Samadhi.
—Huai-Chin Nan, Tao & Longevity: Mind-Body Transformation