The secular arm is duty bound to serve Christ our King, to seek and zealously defend the rights and interests of the Church, to restrain heretics and infidels who seek to promote their errors or hinder the freedom of Christians. All men have the duty to seek the truth and embrace it once it is known, no one has the right or liberty to remain in error and spread it. Pope Leo XIII says, Another liberty is widely advocated, namely, liberty of conscience. If by this is meant that everyone may, as he chooses, worship God or not, it is sufficiently refuted by the arguments already adduced. But it may also be taken to mean that every man in the State may follow the will of God and, from a consciousness of duty and free from every obstacle, obey His commands. This, indeed, is true liberty, a liberty worthy of the sons of God, which nobly maintains the dignity of man and is stronger than all violence or wrong - a liberty which the Church has always desired and held most dear. In the strictest and truest sense, only Christians can have a natural right to religious liberty, because rights are founded in truth.