If you got Jesus, you will know, because his spirit (which lives inside of the saved and borned again) will lead you into the right way.<quoted text>
and how do you know? nobody knows. personally, i believe we live several lives.
And nobody lives but one time in the flesh. Re-incarnation is not Bible truth.
You will live one other time and that is in the Eternal life beyond death in the body that is not made of flesh.
Hebrews 9:27 And as it is appointed unto men once to die, but after this the judgment.
There are evil demon spirits that will come into the mind, that have lived in other bodies, and convince you that you have lived once before. But that's a lie.