The non-theist position is that he wants scientific proof. And even if he got that proof, and became Catholic, could he believe that the little wafer called the Eucharist is the body and blood, soul and divinity of Jesus? See, the questions and desire for “proof” would not end there.
I am greatly saddened that some only guess about Genesis when they can find out.
From Catholic Answers:
"The Time Question
“Much less has been defined as to when the universe, life, and man appeared. The Church has infallibly determined that the universe is of finite age—that it has not existed from all eternity—but it has not infallibly defined whether the world was created only a few thousand years ago or whether it was created several billion years ago.”
From a Jewish source regarding the word “yom.”
judaism.stackexchange.com/questions/10079/what-is-the-meaning-of-yowm-in-bereshit
From Catholic Answers:
"The Topical Reading
"This leads us to the possiblity that Genesis 1 is to be given a non-chronological, topical reading. Advocates of this view point out that, in ancient literature, it was common to sequence historical material by topic, rather than in strict chronological order.
"The argument for a topical ordering notes that at the time the world was created, it had two problems—it was “formless and empty” (1:2). In the first three days of creation, God solves the formlessness problem by structuring different.aspects of the environment.
"On day one he separates day from night; on day two he separates the waters below (oceans) from the waters above (clouds), with the sky in between; and on day three he separates the waters below from each other, creating dry land. Thus the world has been given form.
"But it is still empty, so on the second three days God solves the world’s emptiness problem by giving occupants to each of the three realms he ordered on the previous three days. Thus, having solved the problems of formlessness and emptiness, the task he set for himself, God’s work is complete and he rests on the seventh day.
"Real History
"The argument is that all of this is real history, it is simply ordered topically rather than chronologically, and the ancient audience of Genesis, it is argued, would have understood it as such.
"Even if Genesis 1 records God’s work in a topical fashion, it still records God’s work—things God really did.
"The Catechism explains that “Scripture presents the work of the Creator symbolically as a succession of six days of divine ‘work,’ concluded by the ‘rest’ of the seventh day” (CCC 337), but “nothing exists that does not owe its existence to God the Creator. The world began when God’s word drew it out of nothingness; all existent beings, all of nature, and all human history is rooted in this primordial event, the very genesis by which the world was constituted and time begun” (CCC 338).
“It is impossible to dismiss the events of Genesis 1 as a mere legend. They are accounts of real history, even if they are told in a style of historical writing that Westerners do not typically use.”
The current year on the Hebrew calendar is 5773.
Peace,
Ed