You know it all started back in the Garden of Eden, when neither Adam nor Eve trusted God's Lordship over what they ate. God had told them what they could eat, as His creation. They decided to not trust God and in their worry and anxiety, were deceived.
Self-illumination or self-wisdom is humanism. It is thinking that you, mere human, know more than the Creator God who created you and sustains your life. This mind set runs on pride not love. It is based in anti-trust and not loving trust of a good God who has the power and authority to heal and raise the dead.
Many people still think they can eat whatever they want, whenever they want, in whatever proportions they want, without consequences. That is not God's loving truth. What we put on and into our body is God's choice. And if He says 'no', it means 'no'.
From the very first chapters of the Holy Bible, right through into the more recent books written after Jesus Christ's death and resurrection, it says that God is Sovereign King and LORD over what goes into and onto our bodies and we are to honour God with our choices and let Him guide us, through His Holy Spirit, all the time.
Those who worship the Creator God of the Holy Bible, acknowledge that the body is the temple of the Living God. We are to honour God with our bodies and not unite them with a prostitute. Our hands and feet, mind, soul and spirit were created to do good works which God created in advance for us to do. He appointed these things for us and anointed us and gifted us to do them.
Do not become like those who drink too much wine or gorge themselves on meat. For the drunkard and the glutton will come to poverty and drowsiness/laziness will clothe them in unlawful clothes. Proverbs 23: 20,21
Jesus Christ, God incarnate, repeatedly taught these concepts.
Many people want Jesus Christ to heal them, but they do not want to obey His commandments on life and healing. I explain to people,
"You know how God healed me of an autoimmune disease and life threatening, anaphylaxis and allergies? He taught me that He has complete Sovereignty and Lordship over what goes into and onto my body, every time. 'Submit to God', means 'submit to God.' "
So how do you know what God's will is?
In faithful prayer you trustingly ask Him and He guides you moment by moment, minute by minute, day by day, one day at a time, so you are not overwhelmed with a multitude of instructions and orders.
When we put God first in our life's choices, we worshipfully choose to build His Kingdom and not our own, and we are gifted eternal life.
Jesus Christ taught this.
He said "Love the LORD God with all your heart, soul, mind and strength and love your neighbour as yourself. This is eternal life".
Jesus Christ practised this. He didn't just talk about it.
Listen to what He says. Always do the will of our Heavenly Father.
Don't listen to snakes. They can't heal and raise the dead!