Based on Oruvan Oruvan mudalaali song from Muthu, this song talks about how we have to detach our self from the body-cart and mind-horse so that the self becomes the driver. From that 'One' paramjothi, one half becomes the Universe and other half is just a witness to the Universe. That witness manifests as the manas-sAksi in our minds.
If body is the cart, mind is the horse, aham or self is the driver of this horse-cart. If we let the aham or self to merge with body we wander to our body's needs and if we let it to merge with mind, we wander to our mind's desires. In both cases our self' or aham is not he driver. So we have to merge our self with that witness, that manas-sAksi in us, so that our self controls both the body cart and the mind horse.
Enjoy the song from Muthu
If body is the cart, mind is the horse, aham or self is the driver of this horse-cart. If we let the aham or self to merge with body we wander to our body's needs and if we let it to merge with mind, we wander to our mind's desires. In both cases our self' or aham is not he driver. So we have to merge our self with that witness, that manas-sAksi in us, so that our self controls both the body cart and the mind horse.
Enjoy the song from Muthu