Whether anyone sins through certain malice?

Objections

Objection 1 : It would seem that no one sins purposely, or through certain malice. Because ignorance is opposed to purpose or certain malice. Now "every evil man is ignorant," according to the Philosopher (Ethic. iii, 1); and it is written (Prov. 14:22): "They err that work evil." Therefore no one sins through certain malice.
Objection 2 : Further, Dionysius says (Div. Nom. iv) that "no one works intending evil." Now to sin through malice seems to denote the intention of doing evil [*Alluding to the derivation of "malitia" (malice) from "malum" (evil)] in sinning, because an act is not denominated from that which is unintentional and accidental. Therefore no one sins through malice.
Objection 3 : Further, malice itself is a sin. If therefore malice is a cause of sin, it follows that sin goes on causing sin indefinitely, which is absurd. Therefore no one sins through malice.