Hebrews 11:1

In our quick study of blood we did not touch on one aspect of this substance. It is a feature that cannot be seen, hidden in plain sight by God. We all know it but cannot see it or touch it. We can completely dissect blood into its parts even the elusive enzyme and can recreate in our laboratories every aspect except one, the one we cannot see, the one that separates us from being Gods. It is life. All the blood in the world will do no man any good unless there is life in it and only God has the power to place it. This simple truth, which should be so obvious to all, speaks loudly of the measure of faith that is in every man.
God wants us to have a relationship with him and this one concept, “faith”, is the beginning and the end of that relationship. It is so crucial to him that we have faith in who he is that he placed in each one of us our own personal ability to relate to him.

The unknown author of Hebrews gives us our very best description of faith and how we can personally understand it.

Hebrews 11:1
Now faith is the substance of things hoped for, the evidence of things not seen.

Blood is the substance of life. Without life, there is no hope. You can only have hope as long as you are living. When you are alive you have the ability to hope for a good job, a nicer car, a bigger house a closer walk with God and the list is endless but these kind of things can only be hoped for as long as you are living. When you are dead, you no longer have the ability to hope.

In the spiritual world, faith is our "substance of life", "our blood". Without faith, there would be no life and without life, there would be no hope. We have hope in God because he gave us the substance in which to hold it in, faith. God gives to every man a measure of faith so that he may have in him, hope. Without faith, all hope is lost. Without blood, all life is lost, so God gives to every man a measure of blood.

Blood is the evidence of things not seen. When we see blood, we know that something has life in it. We do not necessarily look at it that way because it is so much a given that it is second nature to us. For me, the only time I am ever brought to this point and have to consider it, is in the movies. Monster movies. Every time there is a new monster on the big screen, I am having to decide along with the actors how are we going to kill it? Where does its life come from? If it does not have blood than its life source is completely foreign to us. Other than the monster being a machine we have nothing in which we can relate to, just finding out that a monster bleeds puts hope in the script. In the movie, Predator, men are fighting a monster that they cannot see and in a blind fury of blazing guns, they are able to wound the predator. His blood is found on some of the jungle foliage and in this evidence, they gain hope. The main actor, Arnold Swartzanegger says something to the effect, “if it bleeds, we can kill it”. It was the blood, that gave them the evidence that there was life.

So we see that Hope is the thing not seen. The fact that we have hope for something is the evidence that we have faith to believe that it can come true and it is this faith, this substance, that hope dwells.