Our spiritual life is also similar to that where we have to be on guard for every moment to make sure we are acting according to the will of The Lord and for The Lord and His devotees. Any moment the enemies within can start attacking and we should be well equipped with all types of weapons such as maha mantra, faith, enthusiasm and prayers to continue the fight. Krishna will send arms and support if we fight faithfully on His behalf. Even if we die in the battle we will be considered for having fought for His sake.
Sometimes we may loose our hand or legs or even head in the fight. Casualties are common in a battlefield and is expected. So there is glory in any case if we are faithful.
Yours
Dinesh