Since we are having a good old fashioned debate about religion and as a religious non-theist [even atheist at times]. I will say something I believe in but have no proof for:
Anatta: Sometimes regarded as soullessness or no self. This is the Buddhist concept of reincarnation but not reincarnation in the classical meaning of the term. Its a transfer of something of who we were.
So how can one be reborn if there is nothing to be reborn and what the hell has Karma got to do with anything?
Karma: The causality of our actions.
If there is no soul that can be reborn, what the hell are you on about Alessandra.
Well it is more complicated than that and one has to get positively Newtonian to go there, for each an every action there is an equal an opposite reaction [Karma]. Then apply some thermodynamics assuming that matter can neither be created nor destroyed but changes from one form to another [Attana].
So everything I do in this life has effect [causality and karma]
Something of myself remains [recycling and Attana] but not myself.
In this belief I am quite comforted [continuity]
One final thought of mine
Mudita is so much more satisfying than Schadenfreude.
Take joy in the achievements of others.
Combine Attana and Mudita and there is less self to worry about.
Better than a thousand hollow words, is one word that brings peace.
~Buddha
Namaste