A class on Bhagavad Gita 2.4-5 given by His Divine Grace A.C. Bhaktivedanta Swami Prabhupada on August 5, 1973 in London.
Bhagavad Gita 2.4
arjuna uvāca
kathaṁ bhīṣmam ahaṁ saṅkhye
droṇaṁ ca madhusūdana
iṣubhiḥ pratiyotsyāmi
pūjārhāv ari-sūdana
Arjuna said: O killer of enemies, O killer of Madhu, how can I counterattack with arrows in battle men like Bhīṣma and Droṇa, who are worthy of my worship?
Bhagavad Gita 2.5
gurūn ahatvā hi mahānubhāvān
śreyo bhoktuṁ bhaikṣyam apīha loke
hatvārtha-kāmāṁs tu gurūn ihaiva
bhuñjīya bhogān rudhira-pradigdhān
It would be better to live in this world by begging than to live at the cost of the lives of great souls who are my teachers. Even though desiring worldly gain, they are superiors. If they are killed, everything we enjoy will be tainted with blood.