18.52 Vivikta-sevi, one who resorts to solitude, is habituated to repairing into such solitary places as a forest, bank of a river, mountain caves, etc.; laghuasi, eats sparingly, is habituated to eating a little-repairing to solitary places and eating sparingly are nentioned here since they are the causes of tranillity of mind through the elimination of defects like sleep etc.-; the person steadfast in Knowledge, yata-vak-kaya-manasah, who has speech, body and mind under control. Having all his organs withdrawn thus, dhyana-yoga-parah nityam, one to whom meditation and concentration are ever the highest (duty)-meditation is thinking of the real nature of the Self, and concentration is making the mind one-pointed with regard to the Self itself; one to whom these meditation and concentration are the highest (duty) is dhyana-yoga-parah-. Nityam, (ever) is used to indicate the absence of other duties like repetition of mantra [A formula of prayer sacred to any deity.-V.S.A.] etc.
Samupasritah, one who is fully possessed, i.e. ever possessed; of vairagyam, dispassion, absence of longing for objects seen or unseen-.
Further,