Whether there are two keys or only one?

❌ Objection 1 : It would seem that there are not two keys but only one. For one lock requires but one key. Now the lock for the removal of which the keys of the Church are required, is sin. Therefore the Church does not require two keys for one sin.

❌ Objection 2 : Further, the keys are given when orders are conferred. But knowledge is not always due to infusion, but sometimes is acquired, nor is it possessed by all those who are ordained, and is possessed by some who are not ordained. Therefore knowledge is not a key, so that there is but one key, viz. the power of judging.

❌ Objection 3 : Further, the power which the priest has over the mystic body of Christ flows from the power which he has over Christ's true body. Now the power of consecrating Christ's true body is but one. Therefore the power which regards Christ's mystic body is but one. But this is a key. Therefore, etc.

❌ Objection 4 : On the other hand, It seems that there are more than two keys. For just as knowledge and power are requisite for man to act, so is will. But the knowledge of discretion is reckoned as a key, and so is the power of judging. Therefore the will to absolve should be counted as a key.

❌ Objection 5 : Further, all three Divine Persons remit sins. Now the priest, through the keys, is the minister for the remission of sins. Therefore he should have three keys, so that he may be conformed to the Trinity.