Concerning the first point he does two things: first, he places the sacrament in the genus of signs; second, he defines signs, at A sign is a thing which, over and above the form which it impresses on the senses, causes something else to come into the mind through itself.
Circa primum duo facit: primo ponit sacramentum in genere signi; secundo definit signum, ibi: signum vero est res praeter speciem quam ingerit sensibus, aliquid aliud ex se faciens in cognitionem venire.