Evil (n.) is not the opposite of good but a propensity to subordinate moral law.
Evil (n.) is primarily a characteristic of the maxims we adopt. Consequently, it has its source in the human will.
Evil (n.) is also the accompanying shadow of evil only as an inconceivable fact.
Evil (n.) is always present as freedom's shadow.
Evil (n.) is considered 'radical' if it goes to the root. Evil is radical not in terms of religion, but in terms of reason.
Evil (n.) is largely a moral category, present universally in human beings as a propensity to self-conceit that influences the adoption of maxims.