Uparati is the abstaining on principle from engaging in any of the acts and ceremonies enjoined by the shastras. Otherwise, it is the state of the mind which is always engaged in Sravana and the rest, without ever diverging from them.
Titiksha (literally the desire to leave) is the bearing with indifference all opposites (such as pleasure and pain, heat and cold, &c.) Otherwise, it is the showing of forbearance to a person one is capable of punishing.
Whenever a mind, engaged in Sravana and the rest, wanders to any worldly object of desire, and, finding it worthless, returns to the performance of the three exercises—such returning is called samadhana.
Sraddha is an intensely strong faith in the utterances of one's guru and of the Vedanta philosophy.
(4.) An intense desire for liberation is called mumukshatva.
Those who possess these four qualifications, are worthy of engaging in discussions as to the nature of Spirit and Not-Spirit, and, like Brahmacharins, they have no other duty (but such discussion). It is not, however, at all improper for householders to engage in such discussions; but, on the contrary, such a course is highly meritorious. For it is said—Whoever, with due reverence, engages in the discussion of subjects treated of in Vedanta philosophy and does proper service to his guru, reaps happy fruits. Discussion as to the nature of Spirit and Not-Spirit is therefore a duty.
Q. What is Spirit?
A. It is that principle which enters into the composition of man and is not included in the three bodies, and which is distinct from the five sheaths (Koshas), being sat (existence),* chit (consciousness),** and ananda (bliss),*** and witness of the three states.
———— * This stands for Purusha.
** This stands for Prakriti, cosmic matter, irrespective of the state we perceive it to be in.