The original documents that make up the New Testament had a limited life. Since there was no printing in those days, copies were made by hand, and copies of copies, and so on. So how reliable was the copying? If you investigate this question you’ll find an enormous range of answers.
Sceptics will tell you there have been so many changes in transmission we can’t have any confidence in the text. The early church has altered what was written, they say, to suit their doctrinal agendas, and copying was like a game of “Chinese Whispers” (excuse the racism, but that is the term often used) where the message is distorted as it is transmitted.
On the other hand, christian apologists say we have so many more copies than any other ancient manuscript, and this allows us to verify that copying has been accurate, there are few doubtful words and no christian doctrine is affected by the uncertainties.
How can we get a handle on the truth between these two extremes?