Gurbani is our guidance (supreme teacher) that will guide us to achieve our salvation. The teachings of Guru Ji are also known as Gurmat. The person that follows every teaching of the Guru is known as a Gurmukh. When Guru Gobind Singh Ji created the Khalsa Army he also got some of his Sikhs to write down the Rehat Marayada (Sikh code of conduct). For a Sikh it is very important to live according to the discipline set out in the Sikh code of conduct. The Sikh who lives by the code of conduct and reads a lot of Gurbani is sure to get the Gurus blessings and achieve their salvation.
Shabad by Sri Guru Gobind Singh Ji (Sarbloh Granth)
Rehani rehai soiee Sikh Mera, Ohu Sahib Mai Uska Chera
They are a true Sikh who follows the discipline/teachings. They are my master and I their slave.
Bina Rehat Ne Sikh Kahavai, Rehat Bina Dar Chota Kavai
Without the Sikh discipline (rehat), call not yourself a Sikh, without Sikh rehat at the court of God you shall receive punishment.
Pritham Rehat Yahe Jan, Khande Ki Pahul Shhekeh.
The First/supreme discipline is to drink the nectar of the double edged sword (Amrit)
I have not love for appearances or for high castes. It is discipline that I love. - (Sri Guru Gobind Singh Ji) Rehatnama Bhai Sahib Singh Jee
Those who turn away from their responsibility to accept the Guru's orders will receive punishment in God's Court. Thankhaanama Bhai Nand Laal Jee
Those who turn their faces away from the True Guru shall have their faces blackened. Night and day, they suffer in pain; they see the noose of Death always hovering above them. Ang 29 Guru Amar Daas Jee Raag Sri Raag
Without discipline the whole world remains deluded. Without discipline they will go to hell. Rehatnama Bhai Desa Singh
The Sikh of the Guru should study Rehat and discipline and they should adopt those principles that please the Guru. Rehatnama Bhai Chaupaa Singh Jee
The most important principle is to forever remember the Rehat given by the Singhs at the initiation ceremony. Rehatnama Bhai Desa Singh
The Sikh never abandons the code of conduct. Rehatnama Bhai Desa Singh
