Throughout all the centuries, there have been always true believers, who kept the Word of God in its originality, because they appreciated it, and also feared God.
God cares enough for his Word, to make sure that it is kept in its originality.
The moral law, the ten commandments, are coded on the heart of every man, his conscience. They must be created, from somebody who is moral.
In all of creation, we see expressed a thought, wisdom and purpose, which shows, that there is somebody who thinks God.
The Bible is a historical book, with recorded historical events.
If Jesus is the Word, how can the Bible not be true?
John 1:1-3, Jeremiah 1:12, Isaiah 55:10,11, Acts 5:38, 39, 1 Peter 1:23-25, 1 Corinthians 15:5, 6, 30, 31, Matthew 5:18, 24:35, Psalm 119:89, Psalm 138:2, Romans 1:19, 20, 2:14, 15, Luke 1:1-4, 2:1-3, 16:17, Revelation 22:18,19, Matthew 2:6, 4:24,25, 7:16-20, 9:26,35, 11:20-23, 12:33, 12:40-42, 19:4-6, Luke 6:43, 44, Ezra 1:4, Hebrews 2:3,4, Acts 2:22, 14:3, 16:26-30, Mark 16:17, 20, John 2:11,23, 3:2, 4:48, 6:2, 10:25, 38, 11:45, 14:11, 20:30,31, Luke 10:13, 11:30-32,51, 12:1, Deuteronomy 28:64, Ezekiel 36:24, Isaiah 7:14, 9:6-7, 53:1-12, John 7:38, 39, Romans 8:16, John 3:5-8, Romans 5:5, 9:15,17,25,27, 1 John 2:27, 3:9, 24, 4:13, 1 Corinthians 2:4,5, James 5:17,18, 2 Corinthians 12:12