"You should not be like an actor, who puts on a costume for the performance and takes it off immediately at the end. Many of us are like that. Although we undertake the practice very seriously during the meditation session, after it is over, we revert to the same negative person again.
We do whatever we like - fighting, quarreling, and so forth ....
Things are easy during the actual meditation session because there is no one interfere with you ... When you meditate, you are trying to transform your mind, but the effect really shows only during the postmeditation period."
- From Awakening the Mind, Lightening the Heart, by His Holiness the Dalai Lama
(Gary R. McClain & Eve Adamson, "Complete Idiots Guide to Zen Living")