The real mission for any human: Find true peace. That can not be found by adopting a religious doctrine.
That much is true! It might be peace, but it would not be real. Opium for the masses as they say. But hey, maybe there is one true religion - but human beings do not have the tools to definitively say that in any case. Even if the Christian god or any other god doesn't exist, it is still illogical to believe in Christianity or any other religion given the cognitive input we are exposed to.
We humans experience everything through our imperfect senses, so nothing can be known for certain. There very well could be a higher power. But to select religion over the far more logical stance of simply suspending judgment is to reject rationality.
I do not deny that there could be a god. However, to leap from this to believing that said god exists is as rational as saying, "Invisible fire breathing dragons could exist, therefore I will start believing in them."
It's great to keep an open mind about profound ideas, but I don't think religion should be placed in an echelon higher than quantum physics in terms of profoundity. God is actually a very simple idea, that can be explained to a young child. A big wise old guy in the sky, looking after us peasants. It makes life make sense and brings people comfort. However, that is a short term trade-off and not worth the overall harm that religion has caused humanity over time; we are better off to avoid religion and be rational. History has proven this.
Subscribing to that idea doesn't make you experience something beyond science, it makes you experience something less. An imaginative perception of reality.
Quantum mechanics is shattering core concepts about the deterministic nature of reality. It's also hinting at ideas like a multi-dimensional universe, in which we are but one facet of unimaginably large and complex membranes which connect and disconnect.
In life we rely on both our emotions and logic, but logic will not fail you or lead you astray, while emotion will. I virtually always rely on logic over emotion and I can say that I virtually always make the right decisions. I only wish that I can help others to use this wonderful tool accessible to all of us.