Who's Grace??

"My grace is sufficient for thee."  2 Corinthians 12:9

I absolutely love this story from C. H. Spurgeon:

'The other evening I was riding home after a heavy day's work. I felt very wearied, and sore depressed, when swiftly, and suddenly as a lightning flash, that text came to me, "My grace is sufficient for thee." I reached home and looked it up in the original, and at last it came to me in this way, "MY grace is sufficient for thee"; and I said, "I should think it is, Lord," and burst out laughing.

 I never fully understood what the holy laughter of Abraham was until then. It seemed to make unbelief so absurd. It was as though some little fish, being very thirsty, was troubled about drinking the river dry, and Father Thames said, "Drink away, little fish, my stream is sufficient for thee." 
Or it seemed after the seven years of plenty, a mouse feared it might die of famine; and Joseph might say,'Cheer up, little mouse, my granaries are sufficient for thee."

Again, I imagined a man away up yonder, in a lofty mountain, saying to himself, "I breathe so many cubic feet of air every year, I fear I shall exhaust the oxygen in the atmosphere," but the earth might say, "Breathe away, O man, and fill the lungs ever, my atmosphere is sufficient for thee."

Oh, brethren, be great believers! Little faith will bring your souls to Heaven, but great faith will bring Heaven to your souls.'

For now, my comments will be null...This story speaks volumes! What are your thoughts? Have you struggled with believing that His grace IS sufficient?