I have set my face like a flint

God told Moses to tell the Israelites to put the blood of a lamb upon the doorposts of their houses and then the Angel of Death would pass over them. And they passed from death to life at what we call the Passover.
All of that speaks about Yeshua the Messiah. It tells us that, if we put the blood of the Lamb on the doorposts of our lives, then, the Angel of Death is going to pass over us and we're going to pass from death to life.