Someone asked whether God forgives every single sin conceivable or possible. Most likely, the person asking the question thinks of ‘sin’ as some immoral, atrocious deed. As Christians, we see sin as inherently a rebellion against God and His order.
So, I’d answer that God, indeed, can forgive every single sin. And He has shown that by sending Christ to die on the cross. He made Christ pay the price for every sin.
The follow-on question, of course, is, “So why isn’t everyone saved?”
That is because I’d continue, “Every sin is forgiven, but not every sinner is repentant.”
The modern narrative about wrong-doing and forgiveness is such that forgiveness is an antidote against resentment, as if the forgiveness is for the victim or recipient of the wrongdoing, rather than the wrongdoer. And then that’s it; we say nothing about the wrong-doer or the part he/she has. Apologies? Making a restitution? What if that is beyond the person? The very least is repentance. Repentance is an appreciation of what sin constitutes, acknowledgement of culpability, and recognising the forgiveness for what it is, and subsequently being liberated from the guilt.