"Most human beings spend all their energies devising ways to increase their pleasure and decrease their pain. Buddhism does not advise that you cease this activity altogether. Money and security are fine. Pain should be avoided whenever possible. Nobody is telling you to give away every possession or seek out needless pain, but Buddhism does advise you to invest time and energy in learning to deal with unpleasantness, because some pain is unavoidable. When you see a truck bearing down on you, by all means jump out of the way. But spend some time in meditation, too. Learning to deal with discomfort is the only way you’ll be ready to handle the truck you didn’t see."
-- Bhante Henepola Gunaratana
Beyond Mindfulness in Plain English