I know this song is used in Kasamh Se, but I think these lines from it really express what Kaju was trying to say to Devu today...as a matter of fact, I think the lines can work both ways - from K to D and from D to K...
"main vo shama hoon jo roshan tumhe karke khudh hi pighal jaaoungi...
subha ka sooraj tumhare liye hai, main hoon raat dhal jaaoungi"
I love this song....and I love DK! 😳