A ''thank you ''is expressed at the end of a favour done and it vaguely expresses further the idea that a recipient of a favour somehow owes something in future. On the other hand a ''Dev Borem Konun'' means 'let God bless you'' for a favour done but there is no hint of a quid pro quo in it.
It is possible that a priest after enjoying a meal of rice, prawn curry,fried fish with a copito or two of feni in one of his parishioners house, may have expressed his gratitude by saying ''Tumkam Devan borem konun'' which Goan catholics incorporated in their day to day language as 'Dev Borem Korun'' literally a God Bless. Antonio
