An Upside Down Kingdom?

In my personal devotions this morning, I was reading about the blind man that Jesus healed. I was inspired by a passage by Max Lucado:

Or what about the blind man Jesus and the disciples discovered? The followers thought he was a great theological case study.
"Why do you think he's blind?" one asked.
"He must have sinned."
"No, it's his folks' fault."
"Jesus, what do you think? Why is he blind?"
"He's blind to show what God can do."
The apostles knew what was coming; they had seen this look in Jesus' eyes before. They knew what he was going to do, but they didn't know how he was going to do it. "Lightning? Thunder? A shout? A clap of the hands?" They all watched.
Jesus began to work his mouth a little. The onlookers stared. "What is he doing?" He moved his jaw as if he were chewing on something.
Some of the people began to get restless. Jesus just chewed. His jaw rotated around until he had what he wanted. Spit. Ordinary saliva.
If no one said it, somebody had to be thinking it: "Yuck!"
Jesus spat on the ground, stuck his finger into the puddle, and stirred. Soon it was a mud pie, and he smeared some of the mud across the blind man's eyes.
The same One who'd turned a stick into a scepter and a pebble into a missile now turned saliva and mud into a balm for the blind.
Once again, the mundane became majestic. Once again the dull became divine, the humdrum holy. Once again God's power was seen not through the ability of the instrument, but through its availability.
"Blessed are the meek," Jesus explained. Blessed are the available. Blessed are the conduits, the tunnels, the tools. Deliriously joyful are the ones who believe that if God has used sticks, rocks, and spit to do his will, then he can use us.

(from The Applesauce of Heaven
by Max Lucado)

My mind went straight back to a phrase I heard a long time ago in church. The upside down kingdom. Everything that Jesus ever did was upside down when you think about it. According to the world's standards, anyways. Jesus always used the weak, the hopeless, the ordinary to teach about the Kingdom of God.
I always focus on what I'm good at and how I can be better at it, instead of asking God to show me what I'm not so good at so He can use that for His glory. We all tend to think that if we're good at something, that's what we should focus on, but according to the life of Jesus, that's backward. Jesus teaches about an upside down kingdom and I believe we as Christians must follow that teaching. How are we to be ambassadors of His if we follow the world's standards?