Intensity is a mental attitude more than a physical attitude. Many people misunderstand what intensity means. They think it means straining and sweating. No! That is a wrong meaning of the word! Intensity is to get totally involved, fully immersed and absorbed in what one is doing. Intense practice means a fast and keen mode in adjusting, correcting, and progressively proceeding.

Astadala Yogamala (Collected Works), Volume 6: (ed. Allied Publishers, 2006) - ISBN: 9788177649765