We may be surprised to learn that many things we consider as acts of spiritual advancement in Krishna consciousness, like tapasya or austerity, are actually acts of selfishness, and will impede our real growth. Even following the four regulative principles in certain ways, can divert us.
“So this austerity is called tapasya, denial, self-denial” (class on SB. 5.5.1 in Vrndavana, Oct 23, 1976). To give up certain forms of selfishness is required to progress in spiritual life, and this is usual