There are two approaches to sādhana. One is motivated by an intellectual conception, the other is motivated by an emotional conception. Intellect and emotion are involved in both approaches, but the intellectual approach has intellect as the prime motive and emotion as the supporting instrument, while the emotional approach has emotion as the prime motive and intellect as the supporting instrument.
The intellectual approach is called śāstrik or vaidhik because intellect is born from śāstra (“śā