Scripture makes the allegory that Right Hand is an allegory is Doing or Action - and ‘forehead’ is a way of thinking:
“You shall bind them as a sign on your hand, and they shall be as frontlets between your eyes”. - Deuteronomy 6:8
“Tie them as symbols on your hands and bind them on your foreheads”. - Deuteronomy 6:8 NIV
“It shall be as a sign on your hand and as frontlets between your eyes, for by strength of hand the Lord brought us out of Egypt.” - Exodus 13:16
“And it will be like a sign on your hand and a symbol on your forehead that the Lord brought us out of Egypt with his mighty hand.” - NIV
“Therefore you shall lay up these words of mine in your heart and in your soul, and bind them as a sign on your hand, and they shall be as frontlets between your eyes.” - Deuteronomy 11:18
RIGHT HAND:
“Your right hand, Lord, was majestic in power. Your right hand, Lord, shattered the enemy.” - Exodus 15:6
“in whose hands are wicked schemes, whose right hands are full of bribes.” - Psalm 26:10
“Why do you hold back your hand, your right hand? Take it from the folds of your garment and destroy them!” - Psalm 74:11
In my understanding, the Mark in Revelation is a way of thinking and acting, and anyone who does not think or act in the manner the Beast demands, cannot earn a living - buy or sell.
This is true in both Sharia, and in MarxoFascism. Obedience to the State IS the only religion permitted, and everyone has to think and act for the glory of the state.
Well, in that part of the world, the left hand is what you clean yourself with. There is a reason that “right” is good, and left is bad.