Okay - can you prove that objective morality exists?
You are aware of the Franz De Waal, right?
He has found evidence that other mammals also possess the pillars of morality (empathy, cooperation, distributive justice, et al).
My guess is that the pillars of morality evolved in mammals.
Now what we do with those pillars is another thing.
I am a fan of situational ethics, I doubt that "objective morality" exists.
For if it does, you haev to deal with the Euthyphro dilemma (but we have wasted time on trying to get people here to address that before).
How do you do that now?
Sorry, but that did not make a bit of sense to me.
No, be precise:
What is the weight of the moral law that is "written in the hearts" of humans?
Even ink has weight.
So how many grams does it weigh?
I doubt that jesus was without sin: what about the whole cursing a fig tree?
And what about how he endorses murder, rape, genocide and slavery.
To me, he sounds all too bronze age human: sexist, racist and bigoted.
If god made me with a big brain, logic and reason, then it would be a sin if I didn't use them.
Or else why did god give them to us? To have us not use them? What is the point of that?
My Pascal's wager is that god only admits rational thinkers into heaven. I don't think god is a fan non-critical thinkers.
So, I will give the whole original sin thing a miss.
Mind you, if I did believe in sin: I would sin often and strongly, as Luther recommended.
Unfortunately for Luther, for the reasons set out above: I doubt faith is a good idea (and I suspect god agrees with me).