Through a tree we were made debtors to God; so through a tree we have our debt canceled.
Irenaeus of LyonsNo man can know God unless God has taught him; that is to say, that without God, God cannot be known.
Irenaeus of LyonsOne should not seek among others the truth that can be easily gotten from the Church. For in her, as in a rich treasury, the apostles have placed all that pertains to truth, so that everyone can drink this beverage of life. She is the door of life.
Irenaeus of LyonsJesus Christ, in His infinite love, has become what we are, in order that He may make us entirely what He is.
Irenaeus of LyonsSuppose there arise a dispute relative to some important question among us, should we not have recourse to the most ancient Churches with which the apostles held constant intercourse, and learn from them what is certain and clear in regard to the present question? For how should it be if the apostles themselves had not left us writings? Would it not be necessary, in that case, to follow the course of the tradition which they handed down to those to whom they did commit the Churches?
Irenaeus of Lyons