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\u201cVery little is needed for everything to be upset and ruined, only a slight lapse in reason. it\u2019s much easier for a mariner to wreck his ship than it is for him to keep it sailing safely; all he has to do is head a little more upwind and disaster is instantaneous. In fact, he does not have to do anything: a momentary loss of attention will produce the same result. It\u2019s much the same in our case. If you doze off, all your progress up to that point will be negated. To keep a sharp eye on your impressions, and never fall asleep. It is no small thing that is being watched over, it equates\u201d\n\n\u2014 Epictetus