Here's where people get mixed up. It was God's intended will that we live forever, on earth, in perfect health. But within the bounds of freewill, Adam sinned, thereby altering forever the perfect plan of God for (Adam's) children. If not for the work of Christ on the cross, can I say that none of us would have a prayer. God's grace is sufficient for the faithful.
We must stop craving for God to bail us out every time we foolishly disobey Him. Our desire should be, must be, to know Him, to worship Him, to Praise Him and to trust Him implicitly.
Hebrews 11:1-12 "Now faith is the substance of things hoped for, the evidence of things not seen. V2 For by it the elders obtained a good report. V3 Through faith we understand that the worlds were framed by the word of God, so that things which are seen were not made of things which do appear. V4 By faith Abel offered unto God a more excellent sacrifice than Cain, by which he obtained witness that he was righteous, God testifying of his gifts: and by it he being dead yet speaketh. V5 By faith Enoch was translated that he should not see death; and was not found, because God had translated him: for before his translation he had this testimony, that he pleased God. V6 But without faith it is impossible to please him: for he that cometh to God must believe that he is, and that he is a rewarder of them that diligently seek him. V7 By faith Noah, being warned of God of things not seen as yet, moved with fear, prepared an ark to the saving of his house; by the which he condemned the world, and became heir of the righteousness which is by faith. V8 By faith Abraham, when he was called to go out into a place which he should after receive for an inheritance, obeyed; and he went out, not knowing whither he went. V9 By faith he sojourned in the land of promise, as in a strange country, dwelling in tabernacles with Isaac and Jacob, the heirs with him of the same promise: V10 For he looked for a city which hath foundations, whose builder and maker is God. V11 Through faith also Sarah herself received strength to conceive seed, and was delivered of a child when she was past age, because she judged him faithful who had promised. V12 Therefore sprang there even of one, and him as good as dead, so many as the stars of the sky in multitude, and as the sand which is by the sea shore innumerable. V13 These all died in faith, not having received the promises, but having seen them afar off, and were persuaded of them, and embraced them, and confessed that they were strangers and pilgrims on the earth."
You must never tell people or even insinuate that they didn't receive what they desired or that their loved one died from sickness because of a lack of faith. What a mockery that is to God, the Omnipotent One, who is and always will be in charge of giving and healing and life. I am convinced that all your efforts to reveal how God works apart from scriptural revelation is the basis for all false images of God and false theology about God's work among mankind. Man's quest to prove himself right has overthrown his sensibility to pure truth, pure anything for that matter.
Excerpt from The Power of God Thinking by Keith C. Powell Copyright 2010