Almost everyone “knows of God”, yet not everyone has a relationship with Him. Do you realize it is not mankind that first reaches out to God, but rather it is He that first reaches out to mankind?
When God created Adam and Eve in the Garden of Eden, He came to fellowship with them every day, but when Adam and Eve ate of the forbidden fruit of the tree of knowledge of good and evil, that fellowship was broken.  And it wasn’t God’s action that caused it, rather it was Adam and Eve’s actions.  Of course, their act of rebellion against God was the result of seeds sown by Satan into their hearts.  You see, Satan could no longer have the fellowship with God that he had enjoyed for unknown ages in heaven, but was cast out of heaven to the earth for his rebellion against God.  So when Adam and Eve came on the scene, and Satan saw their fellowship with the Creator, he immediately went to work to destroy their relationship with God.
Down through the ages, Satan and his fallen angels have done everything in their power to keep mankind and God separated from one another.  Yet, in His infinite wisdom and love, even before there was an earth, even before there was a man on it, before there was ever sin, God determined He wanted fellowship with mankind.  It is written in Revelation 13:8, And all that dwell upon the earth shall worship him, whose names are not written in the book of life of the Lamb slain from the foundation of the world. How can that broken fellowship be restored to what it was before sin happened in the Garden of Eden?  Glad you asked.
Before sin, there was no sickness, sorrow, poverty, lack, strife or destruction.  After sin, all this bad stuff became the new “normal”.  But that isn’t God’s idea of “life”. Long story short, the one we call Jesus, (Y’shua Messiah, His Hebrew name) who had forever been in heaven at His Father’s side, took the form of a man and was born on earth, grew up, and went to the cross to pay the price in full for mankind’s rebellion against His Father.  Now, I’m sure Jesus had better things to do than suffer a horrible death at the hands of man, but His love for us moved Him to do so.  You see, God is not a harsh, hard heavenly being sitting there with a fly-swatter just waiting for you to light so He can swat you.  But yet, many have that view of Him, and I was one of them.
When Jesus began His earthly ministry, He proclaimed the Kingdom of God was among them.  Now, we all know for a kingdom to exist, there must first be a King.  And the King rules the Kingdom, that means things are to be done according to the will of the King.  Now all that sounds like drudgery, right?  Wrong. God, the King of Kings wants GOOD for His people.  Most earthly kings treat their subjects like property that is there to cater to their every whim and desire.  And we ARE to serve God with all our heart and please Him.  But He has our best interests in His heart, He doesn’t want His children suffering. He wants us to live life to the fullest, having constant fellowship with Him, AS IT WAS IN THE BEGINNING.  Get that, it’s important.
So, what could be more fitting to demonstrate the will of the King of heaven, and His love for His people, and the pattern of how His kingdom works, than to heal the sick and suffering among them?  Did He heal everyone in Israel?  No, He only healed those who came out to Him. Some didn’t bother to come out to Him, and nothing was bettered for them.  But all those who came to Jesus were made whole, every single one of them.  Here’s an example in John chapter five;
Joh 5:1  After this there was a feast of the Jews; and Jesus went up to Jerusalem.
Joh 5:2  Now there is at Jerusalem by the sheep market a pool, which is called in the Hebrew tongue Bethesda, having five porches.
Joh 5:3  In these lay a great multitude of impotent folk, of blind, halt, withered, waiting for the moving of the water.
Joh 5:4  For an angel went down at a certain season into the pool, and troubled the water: whosoever then first after the troubling of the water stepped in was made whole of whatsoever disease he had.
Joh 5:5  And a certain man was there, which had an infirmity thirty and eight years.
Joh 5:6  When Jesus saw him lie, and knew that he had been now a long time in that case, he saith unto him, Wilt thou be made whole?
Joh 5:7  The impotent man answered him, Sir, I have no man, when the water is troubled, to put me into the pool: but while I am coming, another steppeth down before me.
Joh 5:8  Jesus saith unto him, Rise, take up thy bed, and walk.
Joh 5:9  And immediately the man was made whole, and took up his bed, and walked: and on the same day was the sabbath.
Joh 5:10  The Jews therefore said unto him that was cured, It is the sabbath day: it is not lawful for thee to carry thy bed.
Joh 5:11  He answered them, He that made me whole, the same said unto me, Take up thy bed, and walk.
Joh 5:12  Then asked they him, What man is that which said unto thee, Take up thy bed, and walk?
Joh 5:13  And he that was healed wist not who it was: for Jesus had conveyed himself away, a multitude being in that place.
Joh 5:14  Afterward Jesus findeth him in the temple, and said unto him, Behold, thou art made whole: sin no more, lest a worse thing come unto thee.
Joh 5:15  The man departed, and told the Jews that it was Jesus, which had made him whole.

Take note here, this man was sick a LONG time.  He desired to be made whole, and even made his best effort to be at the right place at the right time to be healed according to the instructions he had been given years before.  An angel went down “at a certain season” to provide healing, and the sick just had to wait however long it took until the angel showed up.  The Bible doesn’t tell us how often that was, but if someone wanted healing, they would come and wait, like he did.  Well, someone else always managed to step into the healing waters before him, yet he remained, hoping the next time would be HIS time.  And along came Jesus, FULL OF MERCY AND COMPASSION, and asked him a simple question: Wilt thou be made whole? What was the correct answer?  It would have been “OH YES, LORD!”  But like most of us, he had an excuse, saying that he couldn’t make it into the pool in time.  Jesus knew that!  If the man could have gotten into the water on his own, he wouldn’t be there, would he?  Jesus could have said, Too bad, so sad, but He didn’t. He listened to the man’s excuse and said to him,  Rise, take up thy bed, and walk.  In spite of being an invalid for thirty eight years, his healing came “when he believed and obeyed the Lord”.
Later, the Lord Jesus found the man in the temple, hopefully thanking God, but we don’t know that for it isn’t revealed.  But this IS revealed: Jesus said unto him, Behold, thou art made whole: sin no more, lest a worse thing come unto thee.  Jesus warned him not to return to the sin that got him crippled in the first place.  We don’t know what that was, but we know that Jesus knew exactly what it was.  Many times when someone is healed from an affliction, they turn right back to their old way of life and continue as if nothing happened. For example, I’ve seen people healed of lung cancer who went back to smoking again, and they ended up destroying themselves, and then people have the nerve to think it’s God’s fault.  No, the Kingdom of God remains the same forever.  God is merciful, but He gives us free will.  The rules of the Kingdom are for our good, they are not there to keep us in bondage
I find it amazing how many people tell me we aren’t “under the law” anymore, but we are in an age of grace.  Do we have grace to live in disregard to the rules of the Kingdom of God?  No.  God never changes.  He is forever merciful and just.  Don’t forget the “JUST” part.  That’s why Jesus told the man who was healed, sin no more, lest a worse thing come unto thee.  He didn’t tell the man to sin no more to spoil his life, but rather so his life could be enjoyable, free from the “worse thing” and full of joy and blessed. You are very deeply loved by the King of Kings.
Healing the sick gives glory to God and shows us how much He loves us.  Yet, that love also requires we live according to His rules so the devil can’t have his way with us. But in the end, it’s OUR choice whether we want to submit our will unto God and love Him and serve Him. Getting down to a personal level, He won’t make you serve Him, but you’ll be glad if you do.  After all, healing gives God glory, and no matter how long you’ve been sick and suffering, no matter how many excuses you have made for your behavior, no matter where you are in your faith or the lack thereof, no matter how little time you have spent in the past seeking God, no matter how you’ve justified yourself through the years, He is asking you right now, Wilt thou be made whole?
What are you going to tell Him?