Of the Parts of Penance, in Particular, and First of Contrition

We must now consider each single part of Penance, and (1) Contrition; (2) Confession; (3) Satisfaction. The consideration about Contrition will be fourfold: (1) What is it? (2) What should it be about? (3) How great should it be? (4) Of its duration; (5) Of its effect.Under the first head there are three points of inquiry:(1) Whether Contrition is suitably defined?(2) Whether it is an act of virtue?(3) Whether attrition can become contrition?

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Whether contrition is an assumed sorrow for sins, together with the purpose of confessing them and of making satisfaction for them?
Whether contrition is an act of virtue?
Whether attrition can become contrition?