A man that is an heretic, after the first and second admonition, reject; knowing that he that is such is subverted, and sinneth, being condemned of himself.
Irenaeus of LyonsFor where the church is, there is the Spirit of God, and where the Spirit of God, there is the church and all grace.
Irenaeus of LyonsThe initial step for us all to come to knowledge of God is contemplation of nature.
Irenaeus of LyonsThe glory of God is a human being fully alive; and to be alive consists in beholding God.
Irenaeus of LyonsAnd when we come to refute them, we shall show in its fitting place that this class of men [i.e., the gnostics] has been instigated by satan to a denial of that baptism which is regeneration to God, and thus to a denial of the whole faith [by denying all physical aspects of spirituality, including the incarnatian and bodily resurrection of Jesus].
Irenaeus of Lyons