Whenever a person performs any act with all his heart and soul, that act becomes the path.

He sang with all his heart and soul, so much so that his singing became meditation his singing became his purification and his yoga. The first thing to be realized is that Nanak practiced no austerities or meditation or yoga he only sang, and singing, he arrived. Nanak attained God by singing to him Nanak's quest is very unusual - his path was decorated with songs. I will have to sing for lives upon lives before my voice reaches him.' Nanak resumed his song. 'The sparrowhawk is calling to his beloved how can I be silent, because I am competing with him? I will call my beloved as long as he calls his - even longer, because his beloved is nearby, perhaps in the next tree! My beloved is so far away. From the darkness sounded the call of the sparrowhawk. Soon it will be dawn.' Nanak became silent. She could restrain herself no longer and knocked at his door, 'Go to sleep now, my son. Nanak's mother was worried because the night was more than half over and the lamp in his room was still burning. Only Nanak was awake and the echo of his song filled the air. Suddenly thunder sounded and lightning flashed as a few rain drops started to fall. It was a dark moonless night the clouds were heavy with rain because it was the monsoon season. Take what he says with a grain of salt and use your own intelligence to understand he is writing based on his knowledge/experience which may or may not be Gurmat. however for those who don't know he wrote a discourse on JapJi Sahib and it is considered by a lot of people (Sikhs as well) to be very profound. Osho was not a Sikh (google him if you want to know more).

Japji sahib