Hi Paul
You raise a good question. Truth, can be found. If you seek to know who God is, He will show himself to you. Christianity is a faith based in sound logic.
To begin, let me say that we have all been evil in God's sight. You will find the Ten Commandments in the second book of the Bible called Exodus. These are only a few of God's commands, and most of us have broken them all. That is why we are headed for hell, not because we don't believe in God. It is because we are evil and deserve it.
So what do we do? Nothing. We can't make up for our evil (sin). The punishment is death. (this is found in Genesis, the first book during the fall of man). We cannot live through the punishment. But God loved us, so, he made a way.
God became a man (he had to be a man in order to die and pay the penalty of death). He was called Jesus. He lived without doing evil, and died as a substitue for us, so that if we trusted in the work he has done for us, we could be forgiven. This means giving our lives to him, and that is why we must believe in Jesus.
I hope this makes a little more sense out of why we must believe in Jesus. I hope that you will look into the claims of the Bible itself as well. You will find a lot of good information if you study textual transmission, or Lower Criticism of the Bible. That talks about the trustworthiness of the written words in our Bibles. Also check out stuff about Apologetics. There you will find information on the history, and the geography of the Bible. Read the prophecies (located in the Old Testament). check the related history, the dates they were written, and also what is said about Jesus himself, who was not born when they were written. To start you our, check out
www.str.com a very good resource.
Enjoy your studies, and God Bless you!
Phelicia