In the battle, warriors, wear shield and armour. This will give them some protection against the powerful weapons that are shot at them by their enemies. In the spiritual battle, which you must fight, you must also wear a type of shield and armour. Here the shield is devotion and love for God, and the armour is wisdom. In an ordinary war relating to the World, the fighting may last only a few days, or it may drag on for a few months or even some years, but the spiritual battle goes on continuously, it never ends. It has been fought by mankind unceasingly, right from ancient days. Since time immemorial there has been the fight between attachment and detachment; man has been waging an endless war with his feelings of ‘I’ ness and ‘my’ ness, with his feelings of hatred and jealousy, and other evil qualities that have taken shelter within him. Egoism and attachment, in particular, have extraordinary strength; they are really dreadful. Compared to them, the man who is fighting them is not so strong, he is really quite weak. When a weak person attempts to fight such powerful enemies and qualities, he has to wear a very strong shield and armour. The mighty shield and armour that you will have to wear in this spiritual battle is devotion and wisdom; they will protect you from such formidable enemies. In the Samkhya Yoga, Krishna gave Arjuna the armour of wisdom. (DBG, p. 219)