Augmentum habituum non fiat per additionem quia augmentum habituum et aliarum formarum, non fit per additionem formae ad formam, sed fit per hoc quod subiectum magis vel minus perfecte participat unam et eandem formam.
The increase of habits is not by way of addition because the increase of habits and other forms, is not caused by an addition of form to form, but by the subject participating more or less perfectly, one and the same form.