In our original state all souls are pure and we devoted serve Perumal. In our pure state as a soul, none of the souls have a material body as we have now. In that sense we all are identical and have qualities that are pure like our original source – Perumal.
It is because of our contaminating desires and qualities we have to take material bodies that are suited for our contaminating desires and qualities. Since our desires keep changing, we do so many things to try and seek happiness; all such efforts only accumulates karma and gives us newer and newer bodies of various types, birth after birth…. but not happiness! Only service to Perumal and His devotees gives genuine, lasting happiness.
By acharyan anugraham, we somehow receive spiritual knowledge as revealed through scriptures (eg. through regular hearing of en pani and other upanyasam by our Swamy). This helps us get rid of the contaminations and karma accumulated over millions of births, and we can go back to our original pure state as soul without material body.
The easiest process to reach this state is to submit ourselves in Saranagathi to one of the of acharyas in the lineage formed by Ramanujacharya.
Please continue to hear EnPani and other basic upanyasams by our swamy. That will help you understand the fundamentals clearly. You may find past enpani audios on youtube (velukkudi discourses).