[MarkBsnr]

Are you saying that man has no free will UNTIL the Holy Spirit comes into him? So the majority of men have no free will? Can you back this up biblically?

St. Irenaeus did not say CANNOT. He is not saying anything close to the Calvinist position. He is saying IF he DOES NOT. There is no cannot involved. Therefore your commentary on Irenaeus seems a tad off.

I’d say that the acknowledgement of God’s Grace is probably tantamount to accepting it, but that it can be rejected by the choice of the individual at some point in time. I’m not sure that the reverse is true.

We do have different definitions of ‘saved’. We look at ‘saved’ at the Judgement, not here in life, where it is possible to backslide. The Reformed view is that there is a point in time during life where the saving occurs. We may be talking past each other if we continue to use different definitions.

[HarleyD]

Are you saying that man has no free will UNTIL the Holy Spirit comes into him? So the majority of men have no free will? Can you back this up biblically?

Sure.
Rom 6:16 Know ye not, that to whom ye yield yourselves servants to obey, his servants ye are to whom ye obey; whether of sin unto death, or of obedience unto righteousness?
Rom 6:17 But God be thanked, that ye were the servants of sin, but ye have obeyed from the heart that form of doctrine which was delivered you.
Rom 6:18 Being then made free from sin, ye became the servants of righteousness.
Rom 6:19 I speak after the manner of men because of the infirmity of your flesh: for as ye have yielded your members servants to uncleanness and to iniquity unto iniquity; even so now yield your members servants to righteousness unto holiness.
Rom 6:20 For when ye were the servants of sin, ye were free from righteousness.
Rom 6:21 What fruit had ye then in those things whereof ye are now ashamed? for the end of those things [is] death.
Rom 6:22 But now being made free from sin, and become servants to God, ye have your fruit unto holiness, and the end everlasting life.

At one time we were slaves to sin. Now we are free from sin. If the Son sets you free, you will be free indeed. If you want more proof of our fallen nature I would suggest Romans 3.

I’d say that the acknowledgement of God’s Grace is probably tantamount to accepting it, but that it can be rejected

If God gave grace and faith then how can man reject it? I've noticed Catholics don't like to use the term "faith". What precisely does God give?

We look at ‘saved’ at the Judgement, not here in life, where it is possible to backslide.

Then is any of the Saints' saved? Is Mary saved?