Paine on age of ignorance
Thomas Paine, in his The Age of Reason (1794), rightly demarcated that the "age of ignorance" commenced with the Christian system (aka Christianity), a system that promotes "faith" over "reason" (Luther, 1525).
In terms, reason (TR:333) is []

Christian | Apologetics
In recent years, Christian apologeticists, such as William Craig (Come Let Us Reason, 2012) and Frank Turek ("Nature Can't Justify Reason", 2018), have been pushing on the term reason; the following seems to shed light on this coded effort:

“Christians have deified reason under the name of the ‘eternal word’.”
Baron d’Holbach (1770), The System of Nature (pg. 180)

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Quotes
The following are noted quotes:

Reason is the enemy of faith.”
Martin Luther (c.1525), Ranker best Luther quotes (#3|60+) ↑

“My reason is not framed to bend or stoop: my knees are.”
Michel Montaigne (c.1580), Ranker best Montaigne quote (#20|148+) ↑

“I prefer the company of peasants because they have not been educated sufficiently to reason incorrectly.”
Michel Montaigne (c.1580), Ranker best Montaigne quote (#19|148+) ↑↑

“He who establishes his argument by noise and command shows that his reason is weak.”
Michel Montaigne (c.1580), Ranker best Montaigne quote (#72|148+)

“I see men ordinarily more eager to discover a reason for things than to find out whether the things are so.”
Michel Montaigne (c.1580), Ranker best Montaigne quote (#2|148+)

“Nothing ought to be received as truth until it has been proved by good and solid reasons.”
Rene Descartes (c.1620), quote especially impressed Benedict Spinoza

Reason (Google definition)
A Google generated definition of reason, as a cause, explanation, or justification for an action of event; the power of the mind to think, understand, and form judgments by a process of logic.
“The age of ignorance commenced with the Christian system.”
Thomas Paine (1794), The Age of Reason (pg. 60) (png)

“Those who will not reason, are bigots, those who cannot, are fools, and those who dare not, are slaves.”
George Byron (c.1810) (Ѻ)

“In reasoning, the selection of the premises is the all-important part of the process. The main reason for the painfully slow progress of the human race is to be found in the inability of the great mass of people to establish correctly the premises of an argument. Every school ought to give direct instruction in fact-determining and truth-seeking; and the difficulties of these processes ought to be plainly and incessantly pointed out.”
— Charles Elliot (1901) “The School”; cited by Alfred Lotka (1925) [1]

“There is, fortunately, a natural corrective for our inclination to allow likes and dislikes to influence our reason. This corrective is found in the instinct of curiosity, the faculty that impels men to seek the truth, even if it be unpalatable. In fact, a certain type of mind seems to take a particular satisfaction in digging up such otherwise displeasing revelations; the cynic and even the muckraker thus has his useful function. It is probably safe to say, too, that curiosity a desire to know life in all its phases, to ‘experience reality; is fundamentally the motive that impels some individuals to taste of the less savory phases of life.”
Alfred Lotka (1925), Elements of Physical Biology

“I see no reason [owing to the universal nature of] the second law of thermodynamics, to believe in any sort of god, however vague and however attenuated.”
Bertrand Russell (c.1927)

“The laws of human reasoning coincide with the laws governing the sequences of the impressions we receive from the world about us. Pure reasoning, therefore, can enable man to gain an insight into the mechanism of the latter. In this connection, it is of paramount importance that the outside world is something independent from man, something absolute, and the quest for the laws which apply to this absolute appeared to me as the most sublime scientific pursuit in life.”
Max Planck (1948), “Scientific Autobiography”

References
1. Elliott, Charles W. (1903). “The School”, Atlantic Monthly (pg. 584) (Ѻ), Nov.

External links
Reason – Dictionary.com.

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