If so, what is the intent of "for the Most High"? When you make a succah for yourself, I will reckon it to you as if you made it for the Most High.
"shall you make": and not from what is already made — whence it was ruled: If one inclined over the succah, grape-vine, gourd, or thorn (while they were still rooted in the ground) to serve as its roof-covering (sechach), the succah is invalid, (for though he later severed the growth from its root, at the time of the inclining the roof was already "made.")