And the general answer from the resident Christians is read with the Bible.
Well, there seems to be two parts to the question, one is how to get to know Jesus. To do that we are pretty much limited in sources, there is the Bible, and other scripture that didn't make it into the canons. But that is about all the source material available to those of us still alive.
The second question seems more related to some relationship. Their each individual is on his or her own. I don't know of any tests that can be applied to tell if what someone experiences when it comes to things like the supernatural are real. We could track down, perhaps, the individual neurons that fire when someone is having such an experience and say "There, there is the cause!", but is it? Could not GOD cause individual neurons to fire in a prescribed sequency to achieve His communication? Like a telephone, could not GOD or even others use the same method to communicate?
As to religions, they are all creations of men. None of them are GOD.
Had the question been related to GOD as opposed to limited to Jesus, then the sources would be broader, but when limited to Jesus, you are pretty much stuck with only Christian sources.
Edited by jar, : No reason given.
Aslan is not a
Tame Lion