The Bible claims to be truth, as many others do. There is eyewitness testimony of the Resurrection, which you will no doubt reject. I am more convinced by the presuppositional argument which was first formulated by Cornelius Van Till, but the long and short of it is that Spiritually dead people will not understand or accept the truth of God, it is reserved for those the Father has chosen to reveal it to, 

Mat 11:25  At that time Jesus declared, “I thank you, Father, Lord of heaven and earth, that you have hidden these things from the wise and understanding and revealed them to little children;