Tiruppanazhwar
Every human being is the same entity

Explore the life of the 63 Nayanmars and 12 Azhwars - - you will find they were ordinary men and women, attending to some profession for a living, leading a honest and simple life caring for people they interacted with, with their focus totally on God. It is the commitment which counts.
Tiruppanazhwar hailed from the barber clan. Lord Ranganatha instructed Lobasarangamunivar, the chief priest of SriRangam Temple, to hoist Tiruppanazhwar on his shoulders and bring him into the Temple, and the overwhelmed Azhwar sang 10 pasurams (Amalanaathipiran) and merged into the Lord.
Every human being is the same entity; Divisions of labour based on the skills of people later became castes! People started marrying within their work communities for carrying on with the business and this gave rise to caste divisions.
Only people confuse themselves. Anyone can aspire. There is no disparity in the spiritual realm.
In the spiritual domain, nothing is relevant other than your love and devotion for God