“These things I have spoken to you while being present with you. But the Helper, the Holy Spirit (Ruach), whom the Father will send in My name, He will teach you all things, and bring to your remembrance all things that I said to you.” — John 14:25-26
Without a doubt, the New Testament (and by other means the Old Testament) has indeed been preserved through the ages for us to learn from today. These people helped me to understand their reliability and their historical authenticity.
Cold Case for the Reliability of the New Testament with J. Warner Wallace
Learn more from J. Warner Wallace at Cold-Case Christianity and from his YouTube Channel.
The Reliability of the New Testament Text with Dr. James White
Learn more from Dr. James White at Alpha & Omega Ministries and from his YouTube Channel.
How badly did the scribes corrupt the New Testament text? with Dr. Daniel B. Wallace
The Second Great Commission: Constantine and the Making of the New Testament with Dr. Daniel B. Wallace
Learn more from Dr. Daniel Wallace at his personal website and from the work he is doing at The Center for the Study of New Testament Manuscripts.