Vigilance (n.) is aimed inward by the one making progress: he watches himself as an enemy lying in ambush.
Vigilance (n.) over one's thoughts is the money-changer's craft: weigh each coin, check its metal and its stamp, before you let it pass.
Vigilance (n.) cannot achieve faultlessness, but it can be ever intent on avoiding faults — be satisfied to escape a few by never relaxing attention.
Vigilance (n.) is needed because ruin takes so little: the helmsman need only steer a touch too close to the wind, even absent-mindedly, and all is lost.
Vigilance (n.) over his will gives the Cynic so many eyes that Argus was blind beside him; over everything else he lies flat on his back and snores.