There's a face and an arm hidden in this drawing. All things are conscious and sentient, including blast furnaces. Some things may be more or less sentient. One of my philosophical friends said that all things are "natural," even machines and furnaces, because human beings are part of the "natural" world and thus things that they have made are "natural" too. I am not so sure what it even means. Rather like "natural" foods or "natural" materials, does it mean untouched by human-made pollution and chemical mixes? Would you live near a steel mill? The ancient rules of ritual purity and pollution still apply, given a veneer of "scientific" terminology.
Pitt technical pen brown ink on sketchbook page, 3" x 4", February 12, 2015.