Sutra:
234. kIzh thAnum piRarumAna nilaiyaik kulaiththAn. inguth thAnum ivanumAna nilaiyaik kulaikkiRAn.

Sri PBA Swami's Sarartha Deepikai:
Previously by saying "sarva dharmAn parityajya mAm", He destroyed the idea of Him and the other means being the same. By saying "mAm ekam", He is now removing the idea that the chetana's act of surrender and Him are equal (if they are both means to the same goal).

Therefore, it is being shown that neither the other paths nor the performance of the surrender is the true means.

From the usage of "yAvar" in the pasuram "unnal allAl yAvarAlum", the other means are refered by the word "piRar" in this churnai.