Episode 56 is Part 1 of a review of the sermon “Christ Is All In All” by the 17th century British minister Jeremiah Burroughs.
An electronic version of the sermon can be found here at the website of Theology Network from the United Kingdom. (I highly recommend this site. A great source of texts, articles and audio files on a variety of well thought-out, Christ-centered topics.)
Links to Player and Downloads are below