So many Zen students think that the longer they sit the better. They believe 10 years surpasses 10 months or 10 days, which must be better than 10 hours, which is better than 10 minutes or seconds. They treat Zazen like a taxi meter or points to rack up, the more they sit the closer they are to the goal. They equate more and more sitting with going deeper and deeper, or becoming more and more peaceful, or more and more "Buddha-like", or more and more "enlightened".

However, Zazen only truly hits the mark when all measure of time and score, goals and attainment are dropped away. Only then does a moment of sitting contain all time, only then does one realize the destination ever present. Zazen is thus very unlike many forms of meditation (not to mention very unlike our usual clock watching, tally counting, comparing and measuring, goal oriented attitude toward the rest of our busy lives) in which deeper and deeper attainments, and greater and greater achievements, add up with time. In Zazen, one attains the deepest attainment and the greatest achievement, namely, the timeless which is right in each tick of the clock, the goal ever reached again and again in each passing mile on the road across town. But one only realizes so when one sits as the still and round face of the clock which holds all time as the hands make their circles ...

Further reading and discussion for this talk are available on the Treeleaf forum:
SIT-A-LONG with Jundo: Why Zen Folks FAIL!! (5) - Watching The Clock Rackin Up Points »