Sutra:
56. sEshathvam illAtha pOthu SvarUpam illai.

57. AthmApahAramAvathu Svathanthram enkiRa ninaivu: SvathanthramAmpOthu illaiyAy vidum.

Meaning:
56. Only through sEshatvam is the nature of the soul to be determined.

57. The stealing of the soul, which is the thought that one is completely independent, is the highest sin as per the Sastras. This assertion of independence is the opposite of sEshatvam and as such brings great danger to the realization of one's true nature.

Sri PBA Swami's Sarartha Deepikai:
Why say sEshatvam is the nature of the soul; does it then mean that the soul which is knowledge does not have a nature outside of sEshatvam?

No says Sri Pilla Lokacharya. If there is no sEshatvam then it brings about the thought that one's nature is independence. Such a thought is known as stealing one's soul. This thievery is considered to be the root of all sins. So, as soon as a person thinks that he is fully self dependent he immediately loses the realization of his true nature. Therefore it is correct to say "without sEshatvam there is no svarUpam".

With this the meanings of the akAram are concluded.