I sincerely hope that when I die most of my molecules will be recycled and become part of the ongoing fabric of life. A few stray ones, the molecular rebels, will probably head straight off for a black hole or the source of all dark matter wherever that might be.
Whether these molecules will constitute a consciousness or not is anyone's guess - I won't be around to influence them - so the likelihood of me knowing I have indeed been reborn is pretty remote.
As you might have guessed I do not have a faith, nor do I need one at present, but have nothing against anyone else believing in whatsoever they choose as long as it doesn't impinge upon or undermine my current existence.
I'll die happy in the knowledge that a little bit of my corpus might become part of a beautiful dandelion or a hazel tree leaf or the beak of a hummingbird.