There is a well-known Gurbani Shabad by Baba Farid Ji that is often misunderstood because it is read without considering its deeper message.
The pankiti says:
ਫਰੀਦਾ ਰੋਟੀ ਮੇਰੀ ਕਾਠ ਕੀ ਲਾਵਣੁ ਮੇਰੀ ਭੁਖ ॥
Fareedhaa rottee maeree kaat(h) kee laavan maeree bhukh ||
ਜਿਨਾ ਖਾਧੀ ਚੋਪੜੀ ਘਣੇ ਸਹਨਿਗੇ ਦੁਖ ॥੨੮॥
jinaa khaadhhee choparree ghanae sehanigae dhukh ||28||
Sri Guru Granth Sahib Ji: Ang 1379
This Shabad is normally interpreted as:
Fareed, my bread is made of wood, and hunger is my appetizer. Those who eat buttered bread, will suffer in terrible pain. ||28||
Because of such meanings, some people have made up stories and ideas that have no base in Gurmat.
Kaath means wood, and laavan means sabjee or daal that we eat with roti. Chopri roti is that roti on which ghee or butter is applied.
No one eats wooden roti. Some historians made up stories like Baba Farid Jee used to hang a piece of wood around his neck, and whenever he felt hungry he used to chew on that wood. This is absurd, and not eating food is not acceptable in Gurmat.
Baba Jee is teaching us to be satisfied in whatever kind of food we can afford by earning honestly i.e. food that is bought using honest earnings is the only food acceptable in Gurmat. Those who eat delicious and rich food prepared through dishonest earnings will go through a lot of suffering.
In light of the above introduction, the meanings of this pankiti would be as follows:
O Farid, My roti is hard like wood (roti prepared using cheap grains like Jau or Bajra as opposed to soft wheat roti), and my hunger is so strong that it serves as daal or sabjee for me. (When one is extremely hungry, one does not care about taste. Tasteless food too tastes very tasty when one is hungry. So Baba Farid jees hunger serves as his daal and sabji). Those who eat delicious soft wheat rotis applied with ghee or butter (and earned through dishonest means) will suffer immensely.
To interpret this to mean that one should avoid applying ghee on roti is not understanding this pankiti. If ghee was bad, Guru Sahib would not have used it in langar. It is known that Guru ka Langar was very rich during the Guru period, and they even used to put ghee in kheer as written in Ramkali ki Vaar ਲੰਗਰਿ ਦਉਲਤਿ ਵੰਡੀਐ ਰਸੁ ਅੰਮ੍ਰਿਤੁ ਖੀਰਿ ਘਿਆਲੀ ॥ Langar Daulat vandiye, Rass Amrit Kheer Gheaali||.
The issue here is to be contented in whatever Guru Sahib has blessed us with. One can do ardaas, but to covet someone else’s food or to resort to dishonest means to get what you want is not right.