လြန္ခဲ႔တဲ႔ ၁၈ရာစုအတြင္းမွာ ၿမန္မာၿပည္ကုိ ခရစ္ယာန္ သာသနာၿပဳဖုိ႔ ေရာက္ခဲ႔တဲ႔ ၿပင္သစ္ ဘုန္းေတာ္ႀကီး ဘီဂန္ဒက္(၁၈၁၃-၁၈၉၄) ရဲ႕ Outline of the History of the Catholic Burmese Mission from the Year 1720 to 1857 စာအုပ္ထဲမွာ ဘာသာေၿပာင္းသြားတာနဲ႔ လူမ်ဳိးပါ ေၿပာင္းလဲသြားပုံကုိ ဘုန္းေတာ္ႀကီး ဘီဂန္ဒက္က တအံ႔တႀသ မွတ္တမ္းတင္ခဲ႔တာေတြ ႕ရေတာ႔ ၁၈ရာစုအေတြးအေခၚဟာ ၂၁ရာစုမွာ ဆက္လက္႐ွင္သန္ေနဆဲဆုိတာ ဘုန္းေတာ္ႀကီးေတြ႔ရရင္ အံ႔ႀသမယ္မထင္ဘူး။
The few natives that became converts, joined with Christians, and being merged into the community were called kalas, because in the opinion of the Burmese, they had embraced the religion of the Kalas and had become “bonafide” strangers, HAVING LOST THEIR OWN NATIONALITY. This is a strange and somewhat startling fact, but the writer has had numberless opportunities of ascertaining the true opinion of the natives on this point. How often he has heard a Burman Speaking of one of his countrymen, willing to become a Christian, ” he wishes to become a Kala”. Indeed, with the people of these parts, religion and nationality are so intimately connected, so thoroughly blended together, that they form one and same whole. Religion cannot be forsaken without giving up nationality, and in other words, the fact of embracing the religion of another people, is equivalent to becoming a member of the same social or political body.