When I See the Blood, I will Pass Over you.
It is God Who Sees the Blood, NOT the people who put it on.
The Blood is NOT Seen by us, because it is NOT Given to us to See.
We must consequently Use Faith.
Though we may not See It or Feel It, we Simply Believe, for the Blood is for God to See.
The essential matter for us is: has the Blood Been Applied? If it Has Been Applied, there is No More Need to be worried.