FAITH: Pistis
Strong's Number: 4102
conviction of the truth of anything, belief; in the NT of a conviction or belief respecting man's relationship to God and divine things, generally with the included idea of trust and holy fervour born of faith and joined with it, relating to God, the conviction that God exists and is the creator and ruler of all things, the provider and bestower of eternal salvation through Christ relating to Christ, a strong and welcome conviction or belief that Jesus is the Messiah, through whom we obtain eternal salvation in the kingdom of God, the religious beliefs of Christians, belief with the predominate idea of trust (or confidence) whether in God or in Christ, springing from faith in the same, fidelity, faithfulness, the character of one who can be relied on
During Jesus' three years ministry, He was showing evidences that He is God. The Greek word behind "faith" in the NT is pistis. As a noun, pistis is a word that was used as a technical rhetorical term for forensic proof. In the Book of Acts, Chapter 2, Peter appealed to the evidence of the wonders and signs performed by Jesus; he appealed to the empty tomb, and he appealed to fulfillment of OT prophecy. Peter's message were focused on evidences. The point is that Peter grounded belief in Christianity on evidence -- or, as the definition of "pistis" in Acts 17:31 would put it, proofs.
Acts 17:31
For he has set a day when he will judge the world with justice by the man he has appointed. He has given proof of this to all men by raising him from the dead."
In the subject of "healing", Jesus have provided evidences that He is GOD but not what He can do today. But rather, it is God who is working in us to will and to act according to His good purpose. He is able to do immeasurably more than we ask or imagine, according to His power that is at work within us, to Him be glory in the church and in Christ Jesus. Healing is not guaranteed in this temporal life but rather eternal life. The healing of the atonement will bring about our resurrection in glory, where there will be no pain or suffering (Rev. 21:1-4; 22:1-3). This is Christ Promise: Christ is the fulfillment of all Messianic promises, and in Him we are eternally secure. We live today in confidence that Christ cannot fail. He will always accomplish His purposes in His eternal time. My present deliverance sets me free from the penalty and power of sin. Jesus is the Great Deliverer, through whom I have victory over sin, death and Hell. In Christ I have all the power I will ever need. Ephesians 1:19-20 ensures me that the strength of God is within me and is able to raise from the dead. That's healing.
Back to the topic of Job's friends. I am having problem with people who judges people like me based on their faith in certain doctrines. They magnifies the faults of others and diminishes their graces, while it diminishes the faults and magnifies the graces of their doctrines. They closed their minds to everything that was happening around them so they grieved others by their burdensome doctrines which some of us do not agree with.