Srimad Bhagavadgita Sadhaka Sanjivani -Swami Ramsukhdas
Slay, Drona, BhIsma, Jayadratha, Karna and other brave warriors who are already doomed to be killed by Me. Be not afraid. Fight, and you will conquer your enemies, in battle. 34
A striver, gets discouraged when he finds himself incapable of controlling worldly temptation and removing evils. So, the Lord encourages him, by declaring, "Be not distressed with fear. Fight, you will conquer, your enemies." So a striver, having no pride of his own, by depending on the Lord, should perform his duty. If he is worried about the enemies, it means, that he has pride of his own. Moreover, he should not be worried about evil thoughts, if these come to his mind, because they are all perishable, and have been destroyed, by the Lord. So a striver, should not attach importance to them.
- Bhisma, Kama and Drona were well-known for the bravery throughout the world. So it was difficult to get victory over them. Jayadratha was not such a valiant warrior, but he was armoured with the boon that he who dropped his severed head on the ground, would have his own head smashed into a hundred pieces.