Why should We Trust the Gospels Included in the New Testament?

There were many Gospels of Jesus in the early days of Christianity. Some scholars argue that the Four Gospels were selectively chosen, much edited, adapted and reduced.[1] In other words, they claim that the church adapted the Gospels to their taste and excluded the Gospels, which contradicted the doctrines of the church. Therefore, they argue that the Four Gospels cannot be trusted.

Interestingly enough, those people who treasured the canonical Gospels were tortured and lead to coliseum.

But still, why can and should we trust the Four Gospels that we have in our Bibles today?

I believe the following presentation by Donald Arthur Carson, the leading New Testament scholar, can shed some light on the understanding of the question.

youtu.be/hF0BHErlsEQ

After all, the work of the Holy Spirit cannot be excluded from the process of formation of the Bible as it is today.

[1] Bart D. Ehrman, Jesus, Interrupted: Revealing the Hidden Contradictions in the Bible (and Why We Don’t Know About Them) (New York, NY: HarperCollins Publishers, 2009).