Theological conversations in Czech (and English)

Today I went to a baptism at the local Roman Catholic church. Before the baptism I had a conversation with Petr (the father of family I'm staing with) - me in Czech and he in English:

J: 'Svaty voda?' - (Is this) holy water?
P: 'Not yet'
J: 'Proč dělá svaty voda' - What makes this holy water?
P: 'The priest'.

Interesting!