SPUR:

Here's an excerpt from "Two Tramps in Mud Time" by Robert Frost which hangs in my toolbox at home and work:

          “BUT YIELD who will to their separation,
           My object in living is to unite
           My avocation and my vocation
           As my two eyes make one in sight.
           Only where love and need are one,
           And the work is play for mortal stakes,
           Is the deed ever really done
           For Heaven and the future’s sakes.”

                                                           1936