Questions & Answers about Sy werk is sy roeping.
In this sentence, sy means his.
So Sy werk is sy roeping means His work is his calling.
A useful thing to know is that sy can be confusing for English speakers, because Afrikaans sy can also mean she in other contexts. Here, though, both instances are possessive: his.
- sy werk = his work
- sy roeping = his calling
The sentence structure makes that the natural reading here.
Afrikaans often leaves out the article in general statements like this.
So instead of saying something like His work is a calling, Afrikaans naturally says:
- Sy werk is sy roeping.
This gives the sentence a broad, general meaning: his work is what he feels called to do.
If you added an article, the meaning could become more specific or less natural depending on context.