Faith.

I've been told I need to have faith. What is this faith that this person was speaking of?
You see, I was sick - a cough that lasted two weeks. This person said to me, "Have you commanded it away?"
"I have tried. But it didn't work."
"You just don't have faith," then she stopped, realised she was talking to one of her pastors and said, "Well, you're a pastor, of course you have faith."
I just nodded and gave an affirming, "Yeah..."
She then proceeded to tell me that if I tell it long enough to be gone, it will go away. I wanted to respond with some snide remark about white blood cells doing their job, but kept it to myself.
Arrogance is not faith. Many church leaders shout things about 'taking authority'. But these leaders fail to remember that all authority is God given. And if they don't necessarily assume they can take authority over God and tell him what to do, some think they can take authority over creation. These folks forget that we were given dominion over creation in terms of being stewards, not gods. Creation submits to Christ over us any day. Those who assume authority over anything God has authority over himself do not understand the Lordship of Christ. We are his servants, even if we are the keepers of the garden... It's still His garden, after all.

To believe that someone who is sick just doesn't have faith is pure foolishness. Maybe the reason they are sick is because they don't have faith for food to eat. Maybe they're sick because they don't have faith for proper education  ... Or tooth brushes... Or even a proper bed. Those of little faith...
Or maybe those who have 'great faith' aren't actually great givers... But, I don't know. I can't judge them like they do others.
I will judge the rubbish that they spew out, though. 
Faith is far different than thinking you're God. Faith is trusting God to deliver you from or through whatever you're dealing with.
I trust the God I serve with my life. He knows what he wants to accomplish in, through, and around me. If that requires healings, great. But the greatest healing - the greatest miracle - is that of the relationship between God and anyone. And because I've read my Bible, I know he wants to do that in, through, and around me. In the end everyone who serves Jesus will be healed. So, let's be sure to keep our priorities straight: not everyone will go to heaven, but of all the ones who do, they will be healed. So let's see people get saved!