Bhai Aadat Suini was a soldier of the Mogul army. He joined Sikh faith at the time of Guru Arjan. Once he asked the Guru that a soldier’s job was fighting (and of course killing too). How could such a person achieve self-realization. The Guru taught him to always remember God while fighting and always fight for a righteous cause; protect the week and the oppressed; always remain faithful and loyal to his master and live a truthful life. This could help a soldier to the path of liberation (self-realization). Bhai Aadat became a devout Sikh.
(Dr Harjinder Singh Dilgeer)