When God withholds His healing

"But the Lord answered, 'Who makes people able to speak or makes them deaf or unable to speak? Who gives them sight or makes them blind? Don't you know that I am the one who does these things? Now go! When you speak, I will be with you and give you the words to say.'" Exodus 4:11

God is Sovereign! Do you believe that? Do you believe that God is all-powerful?
"Sure I believe it... I believe God can do anything."
Can God heal?
"Yes, God can heal?"
All the time?
"Yes, God can heal all the time, God is all-powerful."
Can God withhold his healing?
"Ahhhh..."
God is all-powerful, right?
"Right. But..."
So since God is all-powerful, can He not withhold as much as he grants.

How can I ever preach God as being less than what He is. Was Moses used for the work of God despite his infirmity. If I believed that healing was my only option for a testimony, I would be waiting and waiting... and time would pass without me.

Oh Lord, what can I do in the meantime? I don't want my answer to be like Moses' words...

"Lord please send someone else to do it." (Ex 4:13)

Instead let me echo the words of Isaiah:

"I'll go, send me." Is. 6:8

Send me... in spite of my infirmity, my illness, my weakness... God use me now!