Where does Irenaeus claim that man can be saved without Divine aid?
Man is Endowed with the Faculty of Distinguishing Good and Evil; So That, Without Compulsion, He Has the Power
Compulsion-a force that compels
Without Compulsion - without a force that compels
We, of course, have to excuse Irenaeus since the Church would not condemn the Pelagius heresy for another 300 years. Many of the early fathers were more interested in trying to get the church to grow rather than putting together a systematic view of scripture.