I find this clip from Leslie Ludy (see her website, http://www.setapartgirl.com/) both challenging and inspiring. I had the privilege of hearing Leslie and her husband, Eric, speak about a year ago and was both encouraged and convicted by their message.
I was convicted by the fact that I have not been living my life all and only for the glory of God.
I was encouraged to shut my ears to the to the traditions and demands of the world, and to listen only to the voice of Jesus Christ and to live only for Him.
~Lissie