Devotee: Prabhupada? We know that His Divine Grace Bhaktisiddhanta Sarasvati always sat very erect and it is stated here in the 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 brahmacari, he could sit like that. That is the sign of brahmacari. He was not a false brahmacari, but he was real brahmacari.
From Srila Prabhupada’s lecture on Bhagavad-gita 6.46-47 — February 21, 1969, Los Angeles