Before machines, there were just us creatures working together. Draft horses are a metaphor for teamwork. While working within restraints, the team gets more accomplished by pulling together. Breuer has an immense respect for working things, animals and people.
“... You have been told also that life is darkness, and in your weariness, you echo what was said by the weary. And I say that life is indeed darkness, save when there is urge and all urge is blind, save when there is knowledge and all knowledge is vain, save when there is work, and all work is empty, save when there is love; and when you work with love, you bind yourself to yourself, and to one another, and to God.” – The Prophet, Kahlil Gibran