The third mode is abstract form. That is, after the form has once been revealed to us, while enclothed in some substance, our imagination has the power to abstract it entirely from the substance and perceive it divested of any substance. This is like the virtues and good attributes that are described in works of ethics, in which we speak about attributes of truth, falsehood, anger, and strength, and the like, abstracted of any substance. We ascribe merits or shortcomings to them even when they are abstract.