Isaiah 8:20 “To the law and to the testimony: if they speak not according to this word, it is because there is no light in them.”
People have argued about the possibility of an absolute truth for a long time. Even some “Christians” say that God’s truth is evolutionary and changing.
Of course, this kind of argument can only come from those who do not know much about the Bible. God’s Book plainly teaches that His words are final and do not ever need changing because they are eternal, but it also teaches that God is all-knowing and knows the end of things as well as the beginning. These facts make the need for an upgrade unnecessary.
The Bible also reveals that God cannot lie. Combined with His infinite knowledge of all things, you can be sure that He has given us absolute truth in His Book.
It is clear that the Bible does not discuss all topics. There are many subjects the Bible does not provide information about, but He has given us the truth that matters the most in this life. It is when we follow that truth that we build on the rock and not on sand. This is not to say that we do not need to learn or get college degrees – they have their place in this world.
Another reason there is absolute truth is because God will judge every human according to His Book the Bible. Since we all face such a judgment from a holy God, it is foolish to entertain other sources of knowledge that tell us how to live – aka – the world, the flesh, and the Devil and those listening to them. They are all deceitful, and the truth is not in them (listening for just a few minutes to modern talk shows will reveal this).
Also, the Bible warns that when people who say they know God are living in sin – know that the truth cannot be found in them, either, except that it agrees with the Bible. I John 2:4 says: “He that saith, I know him, and keepeth not his commandments, is a liar, and the truth is not in him.”