You’re not a lowlife by birth, nor by birth are you a brahmin. You’re a lowlife by your deeds, by deeds you’re a brahmin.
Na jaccā vasalo hoti, Na jaccā hoti brāhmaṇo; Kammunā vasalo hoti, Kammunā hoti brāhmaṇo.
Sutta Nipata 1.7
The same idea in other traditions
The One God is our father; we are the children of the One God. You are our Guru.
There is neither Jew nor Greek, there is neither bond nor free, there is neither male nor female: for ye are all one in Christ Jesus.
Alike the drunk and the strict of fare / For his mistress yearns—in the mosque Love doth dwell / And the church, for his lodging is everywhere. …
Fan Ch'ih asked about benevolence. The Master said, "It is to love all men." He asked about knowledge. The Master said, "It is to know all men." …
Have we not all one father? Hath not one God created us? Why do we deal treacherously every man against his brother, Profaning the covenant of our fathers?
'Now that which is that subtile essence (the root of all), in it all that exists has its self. It is the True. It is the Self, and thou, O Svetaketu, art it.'
And among His Signs is the creation of the heavens and the earth, and the variations in your languages and your colours: verily in that are Signs for those who know.
'Frequently (I have been born) in a high family, frequently in a low one; I am not mean, nor noble, nor do I desire (social preferment).' Thus reflecting, who would brag about his family or about his glory, or for what should he long?