Some of the people with the greatest faith loved God through all their trials, as Job did. It is not a lack of faith that admits the trials, just the opposite; it is faith that is demonstrated when we praise God in the middle of our discomfort. Nothing the devil does to us can deter us from trusting Christ.
God promised to heal our inner soul, not our physical being. When Christ said;
"Isaiah 53:5
5 But He was wounded for our transgressions,
He was bruised for our iniquities;
The chastisement for our peace was upon Him,
And by His stripes we are healed."
He was saying we were healed of our sinful nature, not our physical maladies. Those who use this passage to claim no one has to be sick are using it completely out of context, causing fear and doubt in those who have lifelong illnesses. Not only does this deny the sovereignty of God, it lacks empathy and love.
Isaiah 53:6 "6 We all like sheep have gone astray, each one has turned to his own way; and the LORD has laid upon Him the iniquity of us all.…"
This is all about Spiritual healing. Everyone dies, everyone grows old as a condition of the fall of man. No one is exempt from illness or trials. To admit to them and trust Christ to go through with us is far more valuable than healing our physical bodies.
1 Peter 2:24
"He Himself bore our sins in His body on the tree, so that we might die to sin and live to righteousness. “By His stripes you are healed.”
2 Corinthians 5:21
"God made Him who knew no sin to be sin on our behalf, so that in Him we might become the righteousness of God."
Christ healed people while He was on this earth to demonstrate Who He is, that is, God's Son. He didn't heal everyone, and illness has as much a purpose in our lives as physical healing would have. A life of ease without trials is one that does not come to wisdom or training in righteousness. It is the difficulties that bring us closer to Christ, more dependent on Him.
I have been ill a lot in my life, and each time the Lord healed me through the use of doctors, I praised Him more. It took years before I learned to thank Him for His purposes in the illness, knowing He goes through it all with me in everything.
Never allow prosperity thinking influence you to be ashamed of your illness, your trials or your loss of friends because you follow Christ. Those who blame you for being ill, claiming you lack faith, are themselves the ones who lack faith.
1 John 3:5
"But you know that Christ appeared to take away sins, and in Him there is no sin."
Christ healed our sin-sick nature on the cross when we trusted in Him, not our bodies that are dying. Everyone dies, everyone becomes ill before they die, to accomplish God's will that we will be going home.
Would we ever curse the illness God gave us that was going to send us home to be with Him? Not me!