Our Christian religion is the religion we believe to be true. Not just because we believe it, but because it is full of many a witness to Jesus, His teachings, His Life, Death and Resurrection. Time and witnesses proved the truth of the prophets as well.
It is resplendent with hundreds of eye witnesses. In fact, one would be hard pressed not to believe, from the value of the witnesses. Research for yourselves if you doubt. Seek and ye shall find. Glory.
There came a man sent from God, whose name was John. He came as a witness, to testify about the Light, so that all might believe through him. He was not the Light, but he came to testify about the Light.