Often, Christians act as if the Old Testament is antiquated and of no relevance to Christianity – or in extreme cases, to history  – at all. Neither opinion is true. Explaining why would require two long separate articles; but setting those issues aside, we can still  demonstrate how the New Testament regards particulars in the Old Testament.

I thought it would be fun, informative, and helpful to apply that “technique” to the question of the historical existence of Noah.

On the Coming Home Network discussion forum where I used to moderate (2007-2010), one of the members related a horror story about a person who was leading a Bible study, who taught that Abraham was “the first character in the Bible that we [Catholics] believe actually existed” and that “Adam, Eve, Cain, Abel, Noah, etc. may simply have been literary devices.”

This is not Catholic teaching. If Adam and Eve are not regarded as actual human beings, and the parents of the human race, then the doctrine of the Fall of Man and original sin collapses, and we are not in need of being rescued from a fallen, sinful condition. 

The Catechism of the Catholic Church refers to Adam and Eve eight times (#375, 399, 404, 411, 417, 635, 766, 2361), and ties in their rebellion to the fall of man (#399, 404, 417). St. Paul makes several historical-type references to Adam and/or Eve (Rom 5:14; 1 Cor 15:22, 45; 2 Cor 11:3; 1 Tim 2:13-14).

Likewise, Cain and Abel are referred to as actual human beings twice (#401, 2259), and their actions are also connected to original sin. Our Lord Jesus refers quite literally to Abel (Mt 23:34-35; cf. Lk 11:51). The author of Hebrews includes Abel in his catalogue of the heroes of the faith (Heb 11:4), and refers to his “blood” (12:24).

God made a covenant with Noah. It's pretty difficult to make a covenant with an imaginary, fictional person, and it makes no sense for God to have done that (though it works in Greek mythology). Thus, the Catechism refers to Noah and the flood, and what is called the Noachic Covenant, nine times (italics added):

56 . . . The covenant with Noah after the flood gives expression to the principle of the divine economy toward the “nations”, . . .

58 The covenant with Noah remains in force during the times of the Gentiles, . . . The Bible venerates several great figures among the Gentiles: Abel the just, the king-priest Melchisedek - a figure of Christ - and the upright “Noah, Daniel, and Job”. [Cf. Gen 14:18; Heb 7:3; Ezek 14:14]

71 God made an everlasting covenant with Noah and with all living beings (cf. Gen 9:16). . . .

1080 . . . The covenant with Noah and with all living things renewed this blessing of fruitfulness . . .

2569 . . . Noah's offering is pleasing to God, who blesses him and through him all creation, because his heart was upright and undivided; Noah, like Enoch before him, "walks with God."  (cf. #701, 845, 1094, 1219)

Noah is included in the recitation of heroic faith in Hebrews 11. Note how Abraham is mentioned in the next verse. There is no indication whatsoever that one was a real person and the other a mythical figure only:

Hebrews 11:7-8 By faith Noah, being warned by God concerning events as yet unseen, took heed and constructed an ark for the saving of his household; by this he condemned the world and became an heir of the righteousness which comes by faith. By faith Abraham obeyed when he was called to go out to a place which he was to receive as an inheritance; and he went out, not knowing where he was to go.

St. Peter believed that Noah was a real person too (“God's patience waited in the days of Noah”):

1 Peter 3:18-21 For Christ also died for sins once for all, the righteous for the unrighteous, that he might bring us to God, being put to death in the flesh but made alive in the spirit; in which he went and preached to the spirits in prison, who formerly did not obey, when God's patience waited in the days of Noah, during the building of the ark, in which a few, that is, eight persons, were saved through water. Baptism, which corresponds to this, now saves you, . . .

2 Peter 2:4-5, 9 For if God did not spare the angels when they sinned, but cast them into hell and committed them to pits of nether gloom to be kept until the judgment; if he did not spare the ancient world, but preserved Noah, a herald of righteousness, with seven other persons, when he brought a flood upon the world of the ungodly; . . . then the Lord knows how to rescue the godly from trial, and to keep the unrighteous under punishment until the day of judgment,

Again, the text moves from the fallen angels to Noah, and then to Lot (2:7), who lived in the time of Abraham, and was his nephew, to the time he was writing. St. Peter is arguing by analogy, stating, in effect: “God rescued Noah and Lot; He can and will do the same for you today.”

This makes absolutely no sense if the earlier people are imaginary, because the text would cite the real fallen angels (demons), then move to the supposedly imaginary Noah, then back to historical reality with Lot and the early Christians. This utterly violates the tenor and nature of the passage, as is the case in similar passages noted above.

I would urge anyone to stop attending a study “led” by a person this uninformed. “Blind guides” lead others astray. It is for very good reason that St. James warns:

James 3:1 Let not many of you become teachers, my brethren, for you know that we who teach shall be judged with greater strictness.