The death sentence is a necessary and efficacious means for the Church to attain its end when rebels act against it and disturbers of the ecclesiastical unity, especially obstinate heretics and heresiarchs, cannot be restrained by any other penalty from continuing to derange the ecclesiastical order and impelling others to all sorts of crime ... When the perversity of one or several is calculated to bring about the ruin of many of its children it is bound effectively to remove it, in such wise that if there be no other remedy for saving its people it can and must put these wicked men to death.
Pope Leo XIIIThere is in the Sacred Heart the symbol and express image of the infinite love of Jesus Christ which moves us to love in return.
Pope Leo XIIIIt is shameful and inhuman to treat men like chattels to make money by, or to regard them merely as so much muscle or physical power.
Pope Leo XIIIThere are three influences which appear to Us to have the chief place in effecting this downgrade movement of society. These are-first, the distaste for a simple and laborious life; secondly, repugnance to suffering of any kind; thirdly, the forgetfulness of the future life.
Pope Leo XIIIWhoso turns his attention to the bitter strifes of these days and seeks a reason for the troubles that vex public and private life must come to the conclusion that a fruitful cause of the evils which now afflict, as well as of those which threaten us, lies in this: that false conclusions concerning divine and human things, which originated in the schools of philosophy, have crept into all the orders of the state, and have been accepted by the common consent of the masses.
Pope Leo XIII