“Shastra is without the four principal defects that are visible in the conditioned soul: imperfect senses, the propensity for cheating, certainty of committing mistakes, and certainty of being illusioned. These four principal defects in conditioned life disqualify one from putting forth rules and regulations. Therefore, the rules and regulations as described in the shastra-being above these defects-are accepted without alteration by all great saints, acharyas, and great souls.” (Shrila Prabhupada, Bhagavad-gita, 16.24)