So faith cannot be increased through reason? I should ignore reason altogether?
The Christian Faith does not originate through 'reason'. God tells His people, "Come now, and let us reason together, saith the LORD: though your sins be as scarlet, they shall be as white as snow;" (Is. 1:18) But, this is addressed to His people, the Jews at that time.
Paul is addressing the most 'faithful' church in the world, (Rom. 1:8), when he writes "...present your bodies a living sacrifice, holy, acceptable unto God which is your reasonable service." (Rom 12:1)
In other words, in the Christian faith, faith is always first. Reason then follows. And it's interesting to me in these two verses I cited, that reason is associated with encouraging the believers conduct and obedience.
So, as I said earlier, your question was full of doubt about the Gospels. The implication being, how can they be true or trustworthy having been written so long after the events recorded. You didn't come to the question in faith. You came in doubt.
Which means, and this is important, even if you obtained an answer that satisfied your reason and doubt, your faith was not increased one iota.
(Rom. 1:16-17) For I am not ashamed of the gospel of Christ: for it is the power of God unto salvation
to every one that believeth; to the Jew first,and also to the Greek. For therein is the righteousness of God revealed from
faith to faith: as it is written,
The just shall live by faith."
Quantrill