Paul left trophimus sick because trophimus has faith in Christ's atonement and can be healed according to Mark9:23 by his faith. Trophimus is not an unbeliever to be healed in order to see a sign and believe.
Don't enslave your followers to you for their money.
God is not a man. He is not served by human hands...
Its not our flesh the temporal corrupted that is being saved. .It returns to dust and water when we take our last breath of Oxygen.
Blood represents the unseen eternal spirit. Water is used the same way . literal blood without a spirit that falls like rain form heaven it literally has nothing to offer .What we need is spirit life. Jesus said of his own corrupted flesh it profits for nothing.
The temporal spirit returns to the father who gave it "subject to the letter". The dust and water (clay) It returns to the clay of the field.
When men who have "no faith" that alone comes from hearing the word of God. (sola scriptura) try to add life that goes beyond the last breath . Then they are stuck between Limbo and Purgatory. And men develop their own doctrines like hell .Turning things upside down . Making the idea that our sufferings in the bodies of death will continue to suffer after the last breath Therefore doing despite to His grace.
The letter of the law has its purpose just as well as the unseen law of faith . The idea of men sufferings beyond this temporal. Destroys the doctrine of hell from the interpretation that falls towards earth .
The oral traditions like the doctrine of hell have a great influence on the things not seen . We do not wrestle against flesh and blood. No profit.