If you want to listen to one Christian talk, listen to this one by Chris Mitchell. He talks through part of C. S. Lewis' Mere Christianity in The Christian View of Reality. He means of course, 'what reality really is'.
Download it. Listen to it. Then listen again. I need say no more.
Why I got to listen to this podcast on my walk.
Hitherto I've just enjoyed the scenery, but a friend related his listening to some sports podcast on his walks.
Sport is not my thing, but I thought: plenty of podcasts I want to listen to, so get on with it. Sticky taped the earphones in and off I went.
My son suggested a better way would be Taotronics Soundliberty 79s. I'll see.