169. iLaiya perumALaip pOlE iruvarumAna sErththiyilE adimai seygai muRai.
The true nature of the chetana is to do service to the divine couple, just as Lakshmana did service to both Rama and Sita.
Sri PBA Swami's Sarartha Deepikai:
Why should the chetana do service to both Narayana and Mahalakshmi? Because Lakshmana seeked to do service to both Rama and Sita and did just that. And the goal of the nature of the soul is to do service to the divine couple. Since being enslaved to the Couple is the nature of the soul, doing service to that Couple is the goal of that nature.