Whether habits increases by addition?

❌ Objection 1 : It would seem that the increase of habits is by way of addition. For the word "increase," as we have said, is transferred to forms, from corporeal quantities. But in corporeal quantities there is no increase without addition: wherefore (De Gener. i, text. 31) it is said that "increase is an addition to a magnitude already existing." Therefore in habits also there is no increase without addition.

❌ Objection 2 : Further, habit is not increased except by means of some agent. But every agent does something in the passive subject: for instance, that which heats, causes heat in that which is heated. Therefore there is no increase without addition.

❌ Objection 3 : Further, as that which is not white, is in potentiality to be white: so that which is less white, is in potentiality to be more white. But that which is not white, is not made white except by the addition of whiteness. Therefore that which is less white, is not made more white, except by an added whiteness.