No Guru, No Method, No Teacher was the name of the Van Morrison album where this song formed the centrepiece; it's also the almost-chanted refrain to the tune, which is about life, death, religion, graveyards, family, love and being "misty wet with rain."
In The Garden has been a set piece for Morrison's live shows for well ver two decades. This performance is from 1989, featuring Georgie Fame (on organ, backing vocals and emcee duties) in the band.
I've had the pleasure of seeing Morrison sing In The Garden with a full band, in 1995, in an arrangement quite like this medley from his A Night in San Francisco live record. The Irish singer Brian Kennedy helps out on vocals.