Without doubt, one of the finest teachers of the Gosepl in America is Tim Keller, senior pastor of Redeemer Presbyterian Church in New York City. I have the privilege of hearing Tim in person when I visit my son there. But in the meantime, I listen to him on CD, especially when I travel.
Here, Keller talks about how the Cross of Christ Converts and Changes us.
Unfortunately, I can't link directly to this series of talks. But if you follow the above link and scroll down you can find them. It is well worth your effort. And worth bookmarking for future listening.
And last, a beautiful hymn from Laura's funeral service this week, O God, Our Help in Ages Past at YouTube.