Section — Wouters, Manual of Moral Theology
Scholion II. On the Distinction of Acts of the Will, Considered with Respect to the Defect or Degree of Deliberation
Acts of the will, considered with respect to the defect or degree of deliberation, are usually distinguished:
I. Into first-first motions, which follow the first apprehension of the object, but anticipate every advertence to the morality of the act, as a sudden motion of anger. Motions of this sort are immune from all fault.
II. Into second-first motions, which occur with some advertence, but only imperfect or half-full advertence, to the morality of the act. These motions do not exceed venial sin.
III. Into second motions, which occur with full advertence to the morality of the act. They are therefore fully deliberate or perfectly voluntary, and consequently capable of grave malice (St. Thomas, De Malo, q. 7, a. 6, body, ad 6 and 8; St. Alphonsus, III, 3).