Let not those who seem worthy of credit, but teach strange doctrines, fill thee with apprehension. Stand firm, as does an anvil which is beaten. It is the part of a noble athlete to be wounded, and yet to conquer. And especially, we ought to bear all things for the sake of God, that He also may bear with us. Be ever becoming more zealous than what thou art. Weigh carefully the times. Look for Him who is above all time, eternal and invisible, yet who became visible for our sakes; impalpable and impassible, yet who became passible on our account; and who in every kind of way suffered for our sakes. . . Give ye heed to the bishop, that God also may give heed to you. My soul be for theirs that are submissive to the bishop, to the presbyters, and to the deacons, and may my portion be along with them in God! Labour together with one another; strive in company together; run together; suffer together; sleep together; and awake together, as the stewards, and associates, and servants of God. Please ye Him under whom ye fight, and from whom ye receive your wages. Let none of you be found a deserter. Let your baptism endure as your arms; your faith as your helmet; your love as your spear; your patience as a complete panoply. Let your works be the charge assigned to you, that ye may receive a worthy recompense. Be long-suffering, therefore, with one another, in meekness, as God is towards you.May I have joy of you for ever!
(The Epistle of Ignatius to Polycarp, Chapters III & VI, http://www.newadvent.org/fathers/0110.htm)