In Isaiah 22, Isaiah prophesys that Eliakim, son of Hilkiah will replace Shebna as the stweard in charge of all the king's affairs. He says: "I'll dress him in your robe, I'll put your belt on him. I'll give him your authority."

That's cool because God gives out and takes back authority however he pleases. He can give ME somebody else's authority, or pass mine along to someone else...depending on my stewardship.

Then the Lord says: "I'll pound him like a nail into the wall."
A nail's function is to be IN the wall holding something up. Getting the nail in is what's uncomfortable. God creates us for a certain purpose in His Kingdom, and it takes disciplining from the Lord to get us into that ordained position.
Once the nail is in position, something can be hung on it.
Similarly, once we are in position, the Lord can add responsibility to us, authority to us greater anointing to us, greater humility to us and so on.
The more firmly fastened (disciplined) the nail (believer) is into the wall (Father/Son/Holy Spirit) the more weight can rest upon her.
So are you a dangly, skinny nail some Grade 9 student is banging in during shop class or are you a big fat stud driven in by a power tool?