I particularly like this talk by Shohaku Okumura. I especially like the expression "Zazen is good for nothing" and the teaching that goes with it. The idea that we sit Zazen not for some value to be gained in the future, but rather to sit just for the sake of sitting. I really need to let this sink in and saturate my being. Sitting Zazen has not come easy for me and for some reason this phrase "Zazen is good for nothing" has just enough of a rebellious tone in it for me to motivate me towards sitting down on my zafu.

MN Zen Center: Just Sitting (Okumura)