The brain (cerebrum) is divided into two halves -the right and left hemispheres. Though they work in tandem, the right side of the brain dominates the functions to do with creativity, emotions etc. whereas the left side of the brain dominates analytical and logical functions. When viewed in the context of the Gita, right brain persons get attracted to devotion (𝙗𝙝𝙖𝙠𝙩𝙞) while left brain persons towards awareness (𝙨𝙖𝙣𝙠𝙝𝙮𝙖) . 𝙠𝙖𝙧𝙢𝙖 (action) is common for both.
For 𝙨𝙖𝙣𝙠𝙝𝙮𝙖 oriented people, Krishna earlier gave the logic that none can remain without doing 𝙠𝙖𝙧𝙢𝙖 even for a moment as we are bound to perform 𝙠𝙖𝙧𝙢𝙖𝙨 because of 𝙜𝙪𝙣𝙖𝙨 (3.5, 3.27). This is pure awareness that 𝙜𝙪𝙣𝙖𝙨 are the real 𝙠𝙖𝙧𝙩𝙖 . 𝘽𝙝𝙖𝙠𝙩𝙞 oriented people would find it difficult to comprehend this.
For the 𝙗𝙝𝙖𝙠𝙩𝙞 oriented, Krishna says, "But those who dedicate all their 𝙠𝙖𝙧𝙢𝙖𝙨 to Me, regarding Me as the Supreme goal, worshipping Me and meditating on Me with exclusive devotion, O Parth, I swiftly free them from the ocean of birth and death (𝙨𝙖𝙣𝙨𝙖𝙧𝙖) , for their consciousness is united with Me" (12.6-12.7).
Firstly, dedicating our 𝙠𝙖𝙧𝙢𝙖𝙨 to 𝙋𝙖𝙧𝙖𝙢𝙖𝙩𝙢𝙖 is nothing but being 𝙣𝙞𝙢𝙞𝙩𝙩𝙖-𝙢𝙖𝙖𝙩𝙧𝙖. For example, a knife can cause injury or it can cut ropes to free the entangled. It depends on the user and the knife doesn't get attached to what it is doing -whether it is perceived to be good or bad. Dedicating 𝙠𝙖𝙧𝙢𝙖𝙨 is keeping 𝙋𝙖𝙧𝙖𝙢𝙖𝙩𝙢𝙖 at the centre as the owner and we remain as an instrument in HIS hand.
Secondly, Krishna mentions 'getting free from the 𝙨𝙖𝙣𝙨𝙖𝙧𝙖 of birth and death'. The traditional interpretation is that we will not have any rebirth once we attain HIM. Another possible scenario is that it is eternal freedom (𝙢𝙤𝙠𝙨𝙝𝙖) from pain (death) and pleasure (birth) ripples caused by the ever changing situations around us.