Was Guru Nanak Dev Ji the Lord Himself?

Let’s see what Jaagat Jyot Dhan Dhan Sri Guru Granth Sahib Ji say about this which we can understand easily.

ਆਪ ਨਰਾਇਣ ਕਾਲਾ ਜਗ ਧਰ ਮੈ ਪਰਿਵਾਰਿੳ

“Aap Narayan Kala Dhar Jag Mei(n) Parvario
Nirankar Aakar Jot Jag Mandal Karo
Jah Kah Tah Bharpoor Shabad Deepak Deepaio
Jih Sikhah Sangraho(n) Tat Har Charan Milaio”
(Ang 1385)

Translation of each tuk according to Bhai Manmohan Singh:
1. Assuming power, the Primal Being, of Himself, has entered into the world in the form of the True Guru.
2. Assuming the form of Guru Amar Dass, the Formless Lord has shed light in the world realm.
3. The Lord is fully pervading every-where. It is the Guru, who has lighted the lamp of His Name.
4. Whosoever grasps the quintessence of the Guru’s instruction, the Guru unites him with the Lord’s feet.

Now in the wake of this there should be no doubt what Guru Sahib has said.