Jesus shows his glory in the kind of people that he calls to serve him and in using the gospel to make them willing to follow him. This Sunday it is the epistle lesson that gives unity to the readings, since all of the other readings deal with specific calls to a full time following that leaves behind secular vocations. Jesus still calls such to the holy ministry. To all however comes the call to follow him with a willingness to abandon everything should faithfulness require it; the calls in these readings bid us have a mindset that has forsaken everything, even when we are not required to do it.
It is in the Word that we hear the call of God that has in it the secret power of God to give what he commands. He commands: Believe! and the Word creates faith. He says, Follow me! and the Word creates the desire and the ability to follow him. That he should consider it glorious to call sinners, is that not an amazing thing? That he should attach such power to his Word that we answer the call, is that not a wonder that lasts an eternity for each of us?