Meaning
Supreme God Krishna spoke
Imbued with purified intellect, regulating the self through {Noble, Sāttvic} holding power of mind, restraining or forsaking the objects of senses like speech, etc. (i.e., observing silence and meditating in silence), casting away likes and dislikes, (18:51)
Residing in seclusion with frugal eating habits, keeping control over speech, body, and mind, remaining dedicated to Meditative Yoga practicing constant dispassion, (18:52)
And, by renouncing ego, aggression, vanity, carnal desire, anger, possessions, and the sense of "me and mine," one attains inner calm and becomes worthy of merging into Brahm. (18:53)
Sanskrit
श्रीभगवान् उवाच
विविक्तसेवी लघ्वाशी यतवाक्कायमानसः ।
ध्यानयोगपरो नित्यं वैराग्यं समुपाश्रितः ॥
Word-by-word
वि-विक्त-सेवी, लघु-आशी, यत वाक्-काय-मानसः,
ध्यान-योग-परः, नित्यम् वैराग्यम् सम्-उप-आश्रितः;