Purposeful life, or purposeless?

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

Questioner: You advise us to have a purposeless, aimless life. But if we will not aim for anything, then how will I crack my exams? In your younger days, you too prepared for exams like MBA, IIT JEE, Civil services, etc. But now you say having aims is no good. Aren’t you contradicting yourself?