My desire (More sharp than filed steel) did spur me forth.
I do note / That grief and patience, rooted in them both, / Mingle their spurs together.
Two sorts of spurs seem to have been in use about the time of the Conquest, one called a pryck, having only a single point like the gaffle of a fighting cock; the other consisting of a number of points of considerable length, radiating from and revolving on a center, thence named the rouelle or wheel spur.
But, worthy Hector, She is a theme of honour and renown, A spur to valiant and magnanimous deeds.
... would be a spur to growth. ...