How to know the right work for oneself?

The following is an excerpt from a samvaad (dialogue) session with Acharya Prashant.

Questioner (Q): What does Khalil Gibran mean, when he says, “He who works in marble, and finds the shape of his own soul in the stone, is nobler than he who ploughs the soil.”

Acharya Prashant (AP): What is work?