The scriptures teach the means for gaining Self-realization in two modes - as the yoga with eight limbs (ashtanga-yoga) and as knowledge with eight limbs (ashtanga-jnana). By regulation of breath (pranayama) or by absolute retention thereof (kevala-kumbhaka), which is one of the limbs of yoga, the mind gets controlled. Without leaving the mind at that, if one practises the further discipline such as withdrawal of the mind from external objects (pratyahara), then at the end, Self-realization which is the fruit of enquiry will surely be gained.
BHAGAVAN SRI RAMANA MAHARSHI
SELF - ENQUIRY - (VICHARASANGRAHAM)
I love Ramana Maharshi
Cheers :)
Emma