Srimad Bhagavad-Gita :
Chapter-6. ( Dhyana-yogam )
Slokam-27. ( The benefit gained by fixing the mind in Atmasvarupam ( Supreme Consciousness ) is expressed by Lord Krishna here...)
prasantamanasam hyenam yoginam sukhamuttamam,
upaiti santarajasam brahma-bhutamakalmasham.
santa-rajasam = the polluting garbages, the rajo-guna totally removed (pacified passion);
prasanta-manasam = and thereafter made the mind bright, clear, and pure ( fixed the mind upon Supreme Lord );
akalmasham = further all vasanas completely exhausted ( freed from all past sinful actions );
brahma-bhutam = liberated, by the identification with the Absolute/Lord;
enam yoginam = this yogi;
uttamam sukham upaiti = attains the highest happiness.
Lord Krishna states brahma-bhutam which means endowed with the realisation of the Brahman or spiritual substratum pervading all existence.
To the person who again and again brings their mind under control by the process of withdrawal from all external designations the bliss of yoga or the science of the individual consciousness attaining communion with the ultimate consciousness manifests as soon as all remnants of rajas of passion have been eliminated. So Lord Krishna is declaring that for this superior yoga for whom rajas is no longer an influence and whose mind is completely tranquil and content. To this peerless yogi who has achieved atma tattva or realisation of the soul, it is without a doubt that the supreme bliss comes of its own accord and the ultimate consciousness is attained.
After the yogi or one perfecting the science of the individual consciousness with the ultimate consciousness has withdrawn the mind from sense objects and secured it in the atma; then the mind becoming utterly serene achieves the supreme bliss that is sublime as a matter of course. Lord Krishna speaks of two alternatives: one is santa-rajasam or free from passion and the second is akalmasam or free from the blemishes of desire in other words sinless. Such a person is brahma-bhutam or endowed with the realisation of the Brahman or the spiritual substratum pervading all existence.
A peaceful mind means a mind immovably situated in constant mediation on the atma or soul. Once this is accomplished it is quite natural that the yogi or one perfecting the science of the individual consciousness attaining communion with the ultimate consciousness by dhyana or meditation soon has all blemishes and sins completely purged. The words santa-rajasam means the quality of rajas or passion has become santa or peaceful. Hence one becomes imbued with the qualities of the Brahmam or spiritual substratum pervading all existence and which also refers to the atma and re- establishs one into their true essence of spiritual splendour. To such a yogi comes atma tattva or realisation of the soul and exquisite and phenomenal transcendental felicity. The word used by Lord Krishna hi meaning verily, is an indeclinable particle which gives a reason denoting that by the reason of atma tattva being essentially blissful the yogi becomes blissful as well.
To be continued ....