In this katha by Sant Giani Avtar Singh (Badni Kalan Wale) he gives an insight into the last salok of the sri Jap Ji Sahib.
Thi katha is from the mp3 linked below
http://www.gurmatveechar.com/audios/Katha/02_Present_Day_Katha/Bhai_Avtar_Singh_%28Badni_Kalan_wale%29/Katha_Sri_Guru_Granth_Sahib_Ji/CD_01/66--Bhai.Avtar.Singh--Katha.Guru.Granth.Sahib.Ji--Ang.08.mp3
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