faith and obedience are 2 wings of the same bird... a one  winged bird just flops around and dies, a bird with both wings flies gracefully, fulfills the purpose for which it was created, and brings glory to it's Maker.

Then the LORD said to Moses, “Make a fiery serpent, and set it on a standard; and it shall come about, that everyone who is bitten, when he looks at it, he will live.”  - Nu 21:8

“You shall take a bunch of hyssop and dip it in the blood which is in the basin, and apply some of the blood that is in the basin to the lintel and the two doorposts; and none of you shall go outside the door of his house until morning.  - Ex 12:22