Bhagavad-gita 2.11 (with Spanish translator) — Mexico, February 11, 1975
Hrdayananda: (translating) He wants to know if the greatest offense is to disobey the guru.
Prabhupada: Yes, that is the first offense. If you accept guru and again disobey him, then what is your position? You are not a gentleman. You promise before guru, before Krsna, before fire, that “I shall obey your order; I shall execute this,” and again you do not do this. Then you are not even a gentleman, what to speak about devotee. This is common sense.