Use "spareness" in a sentence

1. We have to slay pride in giants, envy by generosity and nobleness of heart, anger by calmness of demeanour and equanimity, gluttony and sloth by the spareness of our diet and the length of our vigils, lust and lewdness by the loyalty we preserve to those whom we have made the mistresses of our thoughts, indolence by traversing the world in all directions seeking opportunities of making ourselves, besides Christians, famous knights