So funny I just got off the phone with Mark after discussing great guitar players after I just saw Jeff Beck two days ago.
This is probably my second or third favorite Zeppelin number behind "No Quarter" and, arguably, "The Rover".
"In the Light" is an absolute masterpiece. Some of the best composing and guitar work ever starts at 7:10 from the erratic when live or stoned on smack...yet indisputably brilliant Jimmy Page. Mystic quality to this, and it leaves me with a very introspective, yet uncertain feel about it.
Nonetheless, quite moving and unforgettable.
https://www.youtube.com/watch?v=pNo1nS_JV5k