Bhagavad Gita Chapter 6 Verse 15
भगवद् गीता अध्याय 6 श्लोक 15

युञ्जन्नेवं सदाऽऽत्मानं योगी नियतमानसः।
शान्तिं निर्वाणपरमां मत्संस्थामधिगच्छति।।6.15।।



हिंदी अनुवाद - स्वामी रामसुख दास जी ( भगवद् गीता 6.15)
।।6.15।।नियत मनवाला योगी मनको इस तरहसे सदा परमात्मामें लगाता हुआ मेरेमें सम्यक् स्थितिवाली जो निर्वाणपरमा शान्ति है उसको प्राप्त हो जाता है।


Rudra Vaishnava Sampradaya - Commentary





Lord Krishna states the results of concentrated meditation is the  cessation
of worldly existence and promotion to the  effulgent  eternal  realms  where
one abides beyond the Brahman or  the  spiritual  substratum  pervading  all
existence.


Brahma Vaishnava Sampradaya - Commentary





Lord Krishna uses the compound  word  nirvana-paramam  meaning  the  supreme
bliss which commences for an embodied being after  the  cessation  of  birth
and death in the physical body in the material existence and the  attainment
of the eternal spiritual nature.


Shri Vaishnava Sampradaya - Commentary





Attaining communion with the Supreme Lord means linking ones  consciousness
in constant concentration on Him, who is the most  sacred  reality  and  the
highest divinity for which the mind  can  concentrate  upon.  Discipline  of
mind means being fixed and equiposed by dint of the purification ones  mind
receives from association with  devotees  of  the  Supreme  Lord  and  their
contact with Him. Such a person assumes that peace and  understanding  which
has nirvana-paramam or the supreme bliss of  moksa  or  liberation  for  its
result. This moksa is only resulting from contact with  the  Supreme  Being.
Thus after declaring how one who would want to  commence  meditation  should
meditate upon the Supreme Being, this holy of  holiest  subject  is  further
explained by Lord Krishna with supplement directions in order to aid one  in
concentration, purification and meditation.


Kumara Vaishnava Sampradaya - Commentary
Attaining communion with the Supreme Lord means linking ones  consciousness
in constant concentration on Him, who is the most  sacred  reality  and  the
highest divinity for which the mind  can  concentrate  upon.  Discipline  of
mind means being fixed and equiposed by dint of the purification ones  mind
receives from association with  devotees  of  the  Supreme  Lord  and  their
contact with Him. Such a person assumes that peace and  understanding  which
has nirvana-paramam or the supreme bliss of  moksa  or  liberation  for  its
result. This moksa is only resulting from contact with  the  Supreme  Being.
Thus after declaring how one who would want to  commence  meditation  should
meditate upon the Supreme Being, this holy of  holiest  subject  is  further
explained by Lord Krishna with supplement directions in order to aid one  in
concentration, purification and meditation.