Consider this statement: You are reading the writing of Carson Weitnauer.
That statement is true! I wrote it!
You can also confirm that I wrote it because it appears next to my name in RZIM Connect.
Further, the style and voice of my writing in this post is consistent with how I write my emails.
It is logically possible that my computer has been hacked and someone else is writing this. But, I would think it is reasonable for you to conclude that I did write the above statement unless and until you have good reason to believe otherwise.
When it comes to the Bible, I think we have the same kind of dynamic, but there is also the Holy Spirit, living and active, and testifying to our minds, “This is God’s word!”
I think when people read the Bible and recognize it as God’s word - because it is God’s word and because the Holy Spirit confirms that reality - they are making a rational decision to trust that they are reading God’s word. And the Bible itself expects us to have this experience.
However, if Christianity is false, then this line of reasoning is quite bad. On the other hand, if Christianity is true, then it follows logically.
I think a robust Christian theology can have the self-confidence to affirm these truths.
From the perspective of a seeker or skeptic, this may appear to be circular reasoning. However, they lack the crucial information that the God of the Bible is a real entity and therefore is quite capable of speech that does, after all, seem to be from God.
Further, how wonderful it is that God has provided so many other means for us to know that he is real. From the resurrection of Jesus to the daily reality of miracles to the fine-tuning of the universe, there are so many ways that our minds can reasonably conclude that Christianity is true.
But I don’t see any harm in giving someone the Gospel of John and encouraging them to read it! They just might recognize God’s voice when they do…