B.H.U: The way you define yourself determines your choices in life

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

Questioner: I would like to join the army, but my family and friends are not very supportive. They say that when I could easily get a good job in Delhi or Bangalore, what is the point in risking my life as a soldier? What should I reply to them?