Krishna says, "The 𝙥𝙪𝙧𝙪𝙨𝙝 (spirit) within this body is said to be the Witness (𝙙𝙧𝙞𝙨𝙝𝙖) , the Consenter (𝙖𝙣𝙪𝙢𝙖𝙣𝙩𝙖) , the Supporter (𝙗𝙝𝙖𝙧𝙩𝙖) , the Enjoyer (𝙗𝙝𝙤𝙠𝙩𝙖) , the Great Lord (𝙢𝙖𝙝𝙚𝙨𝙬𝙖𝙧) and also the Supreme Soul (𝙋𝙖𝙧𝙖𝙢𝙖𝙩𝙢𝙖) " (13.23). Space is the best example to understand this intricacy. It's called by different names depending on the character it attains like a room, a house, a pot etc. Essentially, there is one space and the rest are its manifestations.
Krishna assures, "Those who understand the truth about 𝙥𝙪𝙧𝙪𝙨𝙝𝙖 , 𝙥𝙧𝙖𝙠𝙧𝙞𝙩𝙞 (nature), and the interaction of the 𝙜𝙪𝙣𝙖𝙨 (three modes or characteristics) born out of nature will be liberated regardless of their present condition" (13.24). Things happen in 𝙥𝙧𝙖𝙠𝙧𝙞𝙩𝙞 because of 𝙜𝙪𝙣𝙖𝙨 and the 𝙥𝙪𝙧𝙪𝙨𝙝 experiences them as pain and pleasure. This realisation is nothing but liberation from the misery of swinging between pain and pleasure.
Krishna earlier explained about liberation from a different angle and said that 𝙠𝙖𝙧𝙢𝙖𝙨 (actions) in all situations are performed by the 𝙜𝙪𝙣𝙖𝙨 ; one who is deluded by 𝙖𝙝𝙖𝙣𝙠𝙖𝙖𝙧 thinks 'I am doer' (3.27). One who knows that 𝙜𝙪𝙣𝙖𝙨 interact with 𝙜𝙪𝙣𝙖𝙨 , is liberated (3.28).
This liberation includes freedom to do anything and thus runs into the argument about how can society survive if the actions termed as sins or crimes are allowed. This argument permits nurturing the seed of hatred through suppression as long as it is not expressed. But Krishna says drop that hatred itself and harmony with existence would happen automatically.
A miracle called the human body which hosts about thirty trillion cells and another thirty trillion bacteria is the best example of such harmony. We don't have to make any special efforts to maintain this harmony. It happens because of the oneness the body feels and liberation is nothing but the realisation of oneness all around.