Pope Boniface VIII quotes:

Silence is the genius of fools and one of the virtues of the wise.

It is necessary to salvation that all Christians be subject to the pope.

We are compelled, our faith urging us, to believe and to holdâ??and we do firmly believe and simply confessâ??that there is one holy Catholic and Apostolic Church, outside of which there is neither salvation nor remission of sins.

We declare, say , define, and pronounce that it is absolutely necessary for the salvation of every human creature to be subject to the Roman Pontiff.

If, therefore, the Greeks or others say that they are not committed to Peter and to his successors, they necessarily say that they are not of the sheep of Christ, since the Lord says that there is only one fold and one shepherd (Jn.10:16). Whoever, therefore, resists this authority, resists the command of God Himself.

Anything done for another is done for oneself.

God has set popes over kings and kingdoms.

Silence gives consent. [Lat., Qui tacet, consentire videtur.]

There is no more harm in adultery than in rubbing one's hands together.

There is one fold and one shepherd.

Therefore, if the earthly power errs, it shall be judged by the spiritual power ... but if the supreme spiritual power errs it can be judged only by God, and not by man ... Therefore we declare, state, define and pronounce that it is altogether necessary to salvation for every human creature to be subject to the Roman pontiff.