blood... token. The blood was the token for Jehovah. Faith in the fact that it had been sprinkled gave peace to all within. It was (and is) not the act of faith which secured, but the truth that was believed. If no blood, belief that it was there gave no security. If blood there, doubt as to the fact would destroy peace, but could not destroy the security, because that was grounded on Jehovah's word, and faith consists in "hearing" that. Romans 10:17; Hebrews 11:1, margin
when. see the blood. Not when you feel, or even believe. So the scarlet cord (Joshua 2:18; Joshua 2:19) was for Joshua to see, not those within the house. Feelings useless apart from faith.