Albert Mohler was one the key-note speakers at the 2012 Shepherd’s 
Conference. While there were several excellent speakers throughout the 
event, this message from Mohler was timely and relevant to me personally
 – and seemed to resonate with the two or three thousand others gathered
 there as well. Here is an excerpt from his introduction, full message 
in video below,
Let’s admit it. There’s a lot of mysteries in the 
christian life, but one of the greatest mysteries is why God would in 
His sovereign, omnipotent and omniscient, and wisdom and righteousness, 
and mercy choose the likes of folks as we… to do this. You might think 
that if we were orchestrating this, we might have angels doing the 
preaching. Everybody would listen to an angel, wouldn’t they? Of course,
  not American angels. We domesticate little angels, we paint little 
pictures of cherubs and hang them in the bathroom. It’s a completely 
different reality. Just remember in the Gospel of Luke, the angelic 
hosts showed up to the shepherds and the first think they had to say is,
 “First of all, don’t die” – “Fear not, we bring you tidings of great 
joy”. Meanwhile, most Americans, in our weirdo, fake, postmodern 
spirituality think they’re channeling with little cherubs in the 
bathroom.
But God doesn’t assign angels to do the preaching. He assigned human 
preachers, men whom He has called because when an angel shows up to 
preach you don’t ask, “How did God do that?”. But, when we show up to 
preach you’re looking at me going (saying), “He’s just flesh and blood. 
He’s nearsighted. He only speaks one language. He’s gonna be hungry 
soon. He fell asleep during a Greek lecture, thirty something years ago 
and you’re letting him preach?” Well, it’s as the apostle Paul says, 
“It’s so that the glory would be all of God’s and not ours. So that the 
excellence would be His excellence that’s demonstrated and not ours.”
Admit it: you’d love to be doing this, and then admit it: That’s a 
good thing. And then let’s just admit it together, it’s just a priceless
 thing that we get to be together for these days and these hours, to 
preach and to hear preaching and to be encouraged, not only by each 
other, but by the Holy Spirit of God in this calling that has come to 
us.