Whether the priest can bind through the power of the keys?

Objections

Objection 1 : It would seem that the priest cannot bind by virtue of the power of the keys. For the sacramental power is ordained as a remedy against sin. Now binding is not a remedy for sin, but seemingly is rather conducive to an aggravation of the disease. Therefore, by the power of the keys, which is a sacramental power, the priest cannot bind.
Objection 2 : Further, just as to loose or to open is to remove an obstacle, so to bind is to place an obstacle. Now an obstacle to heaven is sin, which cannot be placed on us by an extrinsic cause, since no sin is committed except by the will. Therefore the priest cannot bind.
Objection 3 : Further, the keys derive their efficacy from Christ's Passion. But binding is not an effect of the Passion. Therefore the priest cannot bind by the power of the keys.