Fact: as long as the body continues to appear in your experience, you will never be 100% sure if it is the body that gives rise to consciousness, or (eternal unchanging) consciousness that gives rise to the body.
This is why all the great sages have advocated the need to turn inwards, away from all sense objects thoughts and phenomena, for deep and total silence of mind and thoughts, so the true nature of what you are can be intuited (without the mind or body or sense objects/world being present), and in this way the birthless deathless eternal and changing self can be realised (again, without the mind. Realisation is not for the mind or by the person).
🙏
Tom Das 