Therefore, my brethren, let us stand on the rock of faith and in the Tradition of the Church, not removing the landmarks [Prov.22:28] set by our holy Fathers — not giving room to those who wish to introduce novelties and destroy God’s holy, universal, apostolic Church. For if everyone is allowed to do as he pleases, the entire body of the Church will, little by little, be destroyed.

— St John of Damascus

Thanks to FWD from Fr Josiah Trenham.