01. The Law
People brought the sick to the streets so that "at least Peter's shadow might fall on some of them." All were healed. Peter didn't pray or shout; his mere presence carried authority.
"They even carried out the sick into the streets... that as Peter came by at least his shadow might fall on some of them."
02. The Mechanics
The mechanic is Saturation. Peter was so full of the Spirit that power overflowed. A "shadow" is what you project when walking in light. Authority isn't what you do, but what you emanate. Walking with God changes the atmosphere.
03. The Application
What happens when you enter a room? Spiritual authority is felt, not imposed. Seek intimacy in secret so that in public, your "shadow" (silent influence) heals and transforms those around you.