Pope Leo XIII, Sapientiae Christianae:

“It is a high crime indeed to withdraw allegiance from God in order to please men; an act of consummate wickedness to break the laws of Jesus Christ in order to yield obedience to earthly rulers… ‘we ought to obey God rather than men’ (Acts 5: 29)…

Commands that are issued adversely to the honor due to God and hence are beyond the scope of justice, must be looked upon as anything rather than laws… if the laws of men contain injunctions contrary to the eternal law of God, it is right not to obey them… Hence they who blame, and call sedition this steadfastness of attitude in the choice of duty, have not rightly apprehended the force and nature of true law…

Law is of it’s very essence a mandate of right reason, proclaimed by a properly constituted authority, for the common good. But true and legitimate authority is void of sanction, unless it proceed from God the supreme Ruler and Lord of all”.