Calling versus Interest

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

Acharya Prashant (AP): Ekansh is saying, “Sir alright, you said my work should come from my calling.” He is saying, “But today I am interested in one thing, five years later I might be interested in another thing. Then what will happen? Should I change my work, my trade, my stream then?”