There is no religion that is the "true" religion. All of the major religions have a bit of truth, but not the whole truth. It's like this:
There were 3 blind men. They were each placed next to an elephant and asked to describe it. One grasped the leg of the elephant and said, "The elephant is like a large tree." The second pressed against the elephant's side and said, "No, the elephant is like a great wall, tall and vast." Still, the third man ran his hand along the trunk of the elephant and said, "No, the elephant is long and flexible like a snake." All of them had truth about the elephant, just not all the truth. That is what all the major religions are like. They all have some good things to say and they have a little truth, but there is no one true religion that can see the whole elephant.
I've heard this a lot, but this logic does not stand up, and here is why:
This line of thinking ignores the fourth person in the story: The Storyteller. Apparently, the Storyteller has reached an enlightenment unlike any other. The Storyteller has surpassed all great thinkers, philosophers, and scientists because of this one insight:
The Storyteller can see the whole elephant.
How would he know that the 3 blind men got it wrong if the Storyteller himself had only the same partial truth? He assumes superiority by claiming to have absolute truth about the elephant.
No respectable thinker or rational philosopher would claim to be able to see the whole elephant. Only the one who can see the whole elephant for what it truly is can be the one to say things like "there are no absolute truths." or that "all religions are valid and have partial truth, but no one true religion exists."
It is blind arrogance to claim these things, yet so many do. Why?
I believe that when we remove God from the position of the Storyteller, we put ourselves there. This is the problem with Humanism. It relies on our very small and untapped brain to rationalize the universe. It is like asking a steam engine to travel across the U.S. in an hour. And what are we but a passing vapor on this earth?
Maybe we should spend more time wrestling with the fact that we probably don't know what the elephant looks like either.
However, if I put Jesus in the position of the Storyteller, then I place my hope in Him that he is telling me the truth. That's what Christianity is all about: Faith in Christ. Faith that he has told us the Truth. He's the only one who can see the whole elephant. We either believe him or not.
This is the meaning of peace: If He is wrong about the elephant, what do I have to lose?