Sutra:
79. ma: enkiRa viththAl, thanakku uriyan enkiRathu; na enRu aththaith thavirkkiRathu.
80. Aga nama: enkiRa viththAl thanakku uriyananRu enkiRathu.

Meaning:
79. Through ma:, it is said that it belongs to the self. Through the na, it is shown that that is to be rejected.
80. Together the nama: shows that it does not belong to the self.

Sri PBA Swami's Sarartha Deepikai:
The meanings of the na and the ma: parts are shown. ma: is the makAram with the sixth case which has the meaning of mine. Therefore, it carries the idea that I belong to myself. With the na, that idea is rejected and together it means that I do not belong to myself.