http://sikhismgurbani.com is another excellent site for Gurbani Vichaar.
Quote from the Dukh Sukh pdf:
“Dukh sukh are like clothes – kapray – worn by us. So says Guru Nanak Dev.
Sukh dukh due dar kapray pehreh jae manukh. P.149
suKu duKu duie dir kpVy pihrih jwie mnuKu Ò
Guru Amar Das says that the Lord who is our creator – kartai / karta – gives us the dukh sukh laykh (inscribed on our foreheads) when giving us birth in this world.
Tudh dukh sukh naal upaea laykh kartai lekhea. P.787
quDu duKu suKu nwil aupwieAw lyKu krqY iliKAw Ò
It is the Lord’s hukam – command, that the inscribed laykh be based on our past deeds called karm, and we accordingly suffer dukh sukh. So says Guru Nanak Dev.
Hukam lekh dukh sukh pa-ee-eh. P.1
hukim iliK duK suK pweIAih Ò
In Raag Parbhaati Guru Ji makes it clear by saying that the Lord gives us dukh sukh based on our past actions – purab kma-ee.
……….. Sukh dukh purab kma-ee. P.1330 ………..suK duKu purib kmweI Ò
But the dukh is not punishment. It is a remedy which brings one to the fold of the Lord. On the other hand material happiness becomes a sickness as this induces one to forget the Lord. Thus Guru Nanak Dev says that dukh is medicine – daaroo, and sukh is a disease – rog. Where there is sukh (worldly sukh) the Lord, according to Guru Ji, is not present in the mind.
Dukh daaroo sukh rog bha-ea ja(n) sukh taam na hoi. P.469
duKu dwrU suKu rogu BieAw jw suKu qwim n hoeI Ò
Guru Arjan Dev very clearly states that we experience dukh when we forget the Lord – dookh taday jad veesrai. On the other hand when we have the Lord in the mind – cet aa-ay, we experience sukh.
Dookh taday jad veesrai sukh prabh cet aa-ay. P.813
dUKu qdy jid vIsrY suKu pRB iciq Awey Ò