Romans 3:3-4 For what if some did not believe? shall their unbelief make the faith of God without effect? 4 God forbid: yea, let God be true, but every man a liar; as it is written, That thou mightest be justified in thy sayings, and mightest overcome when thou art judged.
Your doubt doesn’t make believe God an empty thing! Your being unfaithful to God doesn’t make Him unfaithful. Truth is not determined by men and what they say! God’s Word is true. He is true! His Word will not be overturned! The fact that some have mishandled the Word of God doesn’t change its truth.
Get a hold of this. Men are liars. God is truth. Men may try to twist the Word of God but it will stand and God will never be found wrong!