Time is compared to a sharp razor. A razor is meant to shave the hair from one's face, but if not carefully handled, the razor will cause disaster. One is advised not to create a disaster by misusing his lifetime: Revision history
Diff selection: Mark the radio buttons of the revisions to compare and hit enter or the button at the bottom.
Legend: (cur) = difference with latest revision, (prev) = difference with preceding revision, m = minor edit.