Alegrias1, you said ‘Nobody knows what was there before. Physicists are the first to say that.’
That’s not strictly correct. According to the standard model of cosmology version of the Big Bang theory, time began to exist as the moment the singularity expanded. Thus, there was no ‘before’.
I once had a discussion about this after a rather boozy evening with a French friend on a beach in Brittany. He was a top NASA cosmologist, and he was explaining string theory to me, drawing in the sand and using keys and flip-flops to mark points in his diagrams and calculations. For one glorious moment, I actually understood string theory with brilliant clarity (but by the time I woke the next day with a hangover, the understanding had evaporated).
In the course of the conversation, I asked him what he thought existed before the Big Bang. He pursed his lips, shrugged, and said ‘Madame, I am merely a physicist, so that is not my expertise. You would need to ask a theologian.’