That is the sign of brahmachari

Devotee: Prabhupada? We know that His Divine Grace Bhaktisiddhanta Saraswati always sat very erect and it is stated here in Bhagavad Gita that one should sit erect. Will this aid us in our concentrating on chanting our japa, if we try to concentrate, if we sit erect while chanting?

Prabhupada: No, no, it doesn't require any sitting posture. But if you can sit, it helps you. It helps you. If you can sit straight like this, it will be very nice, it can help, yes, you can concentrate in chanting and hearing. Therefore these things are required. But we are not very much particular about this. But he was brahmachari, he could sit like that. That is the sign of brahmachari. He was not a false brahmachari, but he was real brahmachari.

Lecture, Feb. 21, 1969, Los Angeles