One of the strongest proofs that Christians are right and really do have the WORD OF GOD is Bible prophecy....
2 Pet 1:19 We also have the prophetic message as something completely reliable, and you will do well to pay attention to it, as to a light shining in a dark place, until the day dawns and the morning star rises in your hearts. 20 Above all, you must understand that no prophecy of Scripture came about by the prophet’s own interpretation of things. 21 For prophecy never had its origin in the human will, but prophets, though human, spoke from God as they were carried along by the Holy Spirit.
See, the Prophets of Israel spoke from GOD ALMIGHTY.....
Or, how about....
Isa 41:21 “Present your case,” says the LORD.
“Set forth your arguments,” says Jacob’s King.
22 “Tell us, you idols,
what is going to happen
Tell us what the former things were,
so that we may consider them
and know their final outcome.
Or declare to us the things to come,
23 tell us what the future holds,
so we may know that you are gods.
Do something, whether good or bad,
so that we will be dismayed and filled with fear.
24 But you are less than nothing
and your works are utterly worthless;
whoever chooses you is detestable.
Well since you can't tell us the future let me share with you what is coming.....
1 Thess. 4:13 Brothers and sisters, we do not want you to be uninformed about those who sleep in death, so that you do not grieve like the rest of mankind, who have no hope.
14 For we believe that Jesus died and rose again, and so we believe that God will bring with Jesus those who have fallen asleep in him. 15 According to the Lord’s word, we tell you that we who are still alive, who are left until the coming of the Lord, will certainly not precede those who have fallen asleep. 16 For the Lord himself will come down from heaven, with a loud command, with the voice of the archangel and with the trumpet call of God, and the dead in Christ will rise first. 17 After that, we who are still alive and are left will be caught up together with them in the clouds to meet the Lord in the air. And so we will be with the Lord forever.
18 Therefore encourage one another with these words.