how do I know God is sovereign?

Can I ask you a question? how do you know that God is truly sovereign? Not just sovereign, but good, wise, BRILLIANT, and complex?

I know this is not the next post that I planned to write about, but since God IS sovereign, he can control what I write, and today, I want to praise Him.

So, to start, a story.

Yesterday, I and three other friends went to Ocean City for the day. Although I had not been there in three or four years, it seemed to me that the waves were quite vicious. I could barely stand a couple of feet out, without getting swept back towards land. A few times, I had to pray I wouldn't hurt a child with my careening body. But, other than some soreness, I am ok, and it was fun. Jeremy, however, who is one of my dearest and best friends, came up to the beach shortly after I got out and said he had been pulled so hard by the waves that he hit the ocean floor with his head, straight on. Well, as you can tell, by the fact that he walked up to me, he didn't die; because of this, we assumed nothing was broken and it was probably a pulled muscle or pinched nerve. He allowed me to massage the hurting area, but it dint make it feel better, but I did detect a slight protrusion on one side of his cervical spinal area. Anyway, he thought he could sleep it off, but didn't really sleep form the pain, and so went to the E.R. this morning.
Well, Jeremy was diagnosed with a fractured spine, in the cervical vertebra c2-c5. He has been under a lot of drugs, but he did relay to me that he does NOT have any neurological damage AND does NOT need surgery. He needs to wear a neck brace and possibly undergo therapy. I just went down to visit him (at his parents, yes, he WAS released today too!), and his mom told me more about the hospital visit. This is what she had to say:

The doctor's believe that Jeremy should have died, on impact. He didn't, and mainly it was due to a birth defect in his neck of three bones fused together. Something that God created Jeremy with that was not supposed to be there, that was an anomaly, saved his life. Wow.

Tonight, I am meditating on Psalm 139, particularly the following verses:

"You made all the delicate, inner parts of my body and knit me together in my mother’s womb. Thank you for making me so wonderfully complex! Your workmanship is marvelous—how well I know it. You watched me as I was being formed in utter seclusion,as I was woven together in the dark of the womb. You saw me before I was born. Every day of my life was recorded in your book.Every moment was laid out before a single day had passed." (verses 13-6, new living translation)

God decided to protect Jeremy from dying...not just dying, but even from being paralyzed or having sustained a more impacting injury, 33 1/2 years earlier.

So, I leave you with the following question:

Is God really sovereign? does He really know everything? is he really kind, good, and generous, particularly in the area of his created ones (us)??? In what ways have you witnessed this in your life (or others??)