Do you believe the DEVIL exists? (Part 1)

"Be alert and of sober mind. Your enemy the devil prowls around like a roaring lion looking for someone to devour.  Resist him, standing firm in the faith, because you know that the family of believers throughout the world is undergoing the same kind of sufferings."  1 Peter 5:8-9 NIV

Some movies glorify the devil and the presence of evil. 
These seem very real.
But God is nonexistent. 

Some movies go in the opposite direction with the enemy.  They rarely, if ever, show his schemes in the lives of the characters; they don't want to "see a demon behind every rock."  Naturally explained problems are considered the norm, while spiritual problems are barely acknowledged. 

In an exorcism book I read, for example, psychologists, law enforcement, and medical professionals were consulted to make sure they could rule out the scientifically explainable.

Here is my issue.

I believe the Lord Jesus was, is, and will forever be the ultimate psychologist, law enforcer, and healer.  Yet I don't see him teaching His disciples to "rule all of this out" before casting out demons.  He very much assumed the presence of the evil one attacking people on earth.  The Bible says "The reason the Son of God appeared was to destroy the devil’s work."

Now am I saying "other factors" shouldn't be "considered?" 
It depends.

I don't assume that the role of skeptic is an automatically trustworthy position.
I don't assume scientific authority is inherently trustworthy.
I believe these assumptions glorify human reasoning.  
They negate spiritual origins and solutions. 
They subtly assume that spiritual reality is an abnormality. 
Rarely experienced. 
Considered only as a last resort.
They assume a certain level of rationality.
But how rational is it to ignore the spiritual when our lives are built on the spiritual? 

As it is written in the scriptures:
By faith we understand that the universe was formed at God’s command, so that what is seen was not made out of what was visible

"The Son is the image of the invisible God, the firstborn over all creation. For in him all things were created: things in heaven and on earth, visible and invisible, whether thrones or powers or rulers or authorities; all things have been created through him and for him. He is before all things, and in him all things hold together."

We should START from the spiritual origin of problems!  We should BEGIN by ruling demons out!  If the problem really is demonic, why give an enemy more time to torment?  Wouldn't it be better to briefly delay solving a natural problem if a personal spiritual evil is involved?  We know the natural problems aren't personally out to get the ones afflicted!