During zazen, brain and consciousness become pure. It's exactly like muddy water left to stand in a glass. Little by little, the sediment sinks to the bottom and the water becomes pure.
Taisen DeshimaruWhat is called zazen is sitting on a zafu [pillow] in a quiet room, absolutely still, in the exact and proper position and without uttering a word, the mind empty of any thought, good or wicked. It is continuing to sit peacefully, facing a wall, and nothing more. Every day.
Taisen DeshimaruIf you have a glass full of liquid you can discourse forever on its qualities, discuss whether it is cold, warm, whether it is really and truly composed of H-2-O, or even mineral water, or saki. Meditation is Drinking it!
Taisen Deshimaru