“Evil has no substance of its own, but is only the defect, excess, perversion, or corruption of that which has substance.”
“I inquired what wickedness is, and I didn't find a substance, but a perversity of will twisted away from the highest substance – You oh God – towards inferior things, rejecting its own inner life and swelling with external matter.”
“Only the other world has substance and reality; only good deeds and holy learning have tangible worth.”
“I do not admire greatness that has no substance.”
“The abstract idea of a spirit certainly implies that it has neither substance, form, shape, voice, or anything which can render its presence visible or sensible to human faculties.”
“[Perverse] unreason has its own logical processes”