Guru Gobind Singh Ji gave the Khalsa the Amrit of the double edged sword. The khalsa is the army of God, its purpose is to practice truth and defend humanity. The khalsa stands for the principles of justice, righteousness and truth. The khalsa will die in the battlefield but never compromise theses principles. Guru JI said that his Khalsa should always be ready 24/7. (In other words never get caught slipping) Guru Ji gave the following commands to the Sikhs:
Thankhaanama Bhai Nand Laal Je
They are the Khalsa who is forever ready for battle.
Thankhaanama Bhai Nand Laal Jee
They are Khalsa who never runs from the battlefield and enshrines the warrior lifestyle in his heart.
Rehatnama Bhai Desa Singh
They are Khalsa who never abandons his weapon (Kirpaan). Recognise them as the disciplined and pure Khalsa.
Rehatnama Bhai Desa Singh
They are Khalsa who destroys the tyrant enemy.
Thankhaanama Bhai Nand Laal Jee