“ Now Catholic doctrine teaches us that the first duty of charity is not in the tolerance of erroneous convictions, however sincere they may be, nor in theoretical or practical indifference to error or vice in which we see immersed our brothers, but in zeal for their intellectual and moral improvement no less than for their material well-being. This same Catholic doctrine also teaches us that the source of love of neighbor is found in the love of God.... All other love is illusion or sterile and fleeting feeling... we need the union of minds in truth, the union of wills in morality, the union of hearts in the love of God and his Son, Jesus Christ. However, this union is only achievable through Catholic charity.. ” (Saint Pius X, Encyclical Our Apostolic Charge , 8/25/1907)
