Sutra:
231. iththai ozhiyavum thAnE kAryam seyyumenRu ninaikkak kadavan.
232. allAtha pOthu upAya nairapEksham jeeviyAdhu.
233. idhu Sarvamukthi prasanga parihArArththam; budhdhi SamAdhAnArththam; caithanya kAryam; rAga prAptham; SvarUpa nishtam; aprathishEthathyOthagam.

Sri PBA Swami's Sarartha Deepikai:
Since it is His effort that is responsible for the attachment to this means, He does not do it for this goal. Even if this surrender is not done, it is to be understood that He, who is focused on the upliftment of the chetana, would give what the chetana needs and remove what he doesn't.

If not - that is, if the chetana thinks that He will not do that without this surrender and that the surrender is required for Him to do it - the greatness of the siddhopaya (the Lord), which is that it does not require anything, will be spoiled.

If that is the case, why is the surrender to be performed?

It is needed to answer the question of sarva mukti prasangam (if the chetana does not have to do anything for Him to do His act, then shouldn't everyone attain liberation).

It is needed so that the chetana does not become confused as to why He who did not protect him for so long will do that now.

Since he is not an achetana, the thought that He is the means is the result of his being a chetana (using his knowledge).

This act which did not happen due to fate but due to the chetana's love for it born out of his understanding of its taste, is not opposed to his nature. Instead it is appropriate to his nature of seeking His protection.

Since the chetana has rejected His protection for age- less time, this puts the spotlight on the fact that he has now given up doing that.

This is the meaning of this act and not that it itself is the means.