Let the fear of danger be a spur to prevent it; he that fears not, gives advantage to the danger. - Francis Quarles
Pray that your loneliness may spur you into finding something to live for, great enough to die for. - Dag Hammarskjold
Good and evil, reward and punishment, are the only motives to a rational creature: these are the spur and reins whereby all mankind are set on work, and guided. - John Locke
The trouble with lies was that once started, the fiction had to be continued, and it was hard always to be remembering details that you had made up upon the spur of the moment. - Elizabeth Aston
I have no spur to prick the sides of my intent, but only vaulting ambition, which o'erleaps itself, and falls on the other. - William Shakespeare