What is zazen good for?

"What's zazen good for? Absolutely nothing! This 'good for nothing' has got to sink into your flesh and bones until you actually practice what is truly good for nothing. Until then, your zazen is just good for nothing."


-Kodo Sawaki (quoted in "Attitude to Zazen: Quotes from Kodo Sawaki" on Antaiji's website (see my links).