Goodness is the spring which causes the modification of the senses. It is, again, the great enlightener. No duty has been laid down that is higher than Goodness.
सत्त्वं वैकारिकी योनिरिन्द्रियाणां प्रकाशिका। न हि सत्त्वात् परो धर्मः कश्चिदन्यो विधीयते॥