Episode 0384 - On Purity (Click on the above link, or here, for audio.)
Comments on deeper meanings of the word "purity" from 3 religious perspectives: New Testament Philippians 4:8, Pali Buddhist Ratha-Vinita Sutta (on "Relay Chariots"), Nityananda of Ganeshpuri on continual life-tests & the importance of vairagya.