Where Does the bible testify of itself?

The Bible says, "All scripture is given by inspiration of God." 2 Timothy 3:16. "Prophecy came not in old time by the will of man: but holy men of God spake as they were moved by the Holy Ghost." 2 Peter 1:21. "The scripture cannot be broken." John 10:35.

Answer: It claims to be inspired. It was written by men who were guided by the Holy Ghost. It cannot be broken or proved untrue.