How to meditate continuously for 24 hours?

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

Questioner (Q): A couple of days ago, I asked you a question regarding thoughts at the time of meditation, and you completely destroyed me, and I’ve been trying to assimilate what you had said. So, the point you had mentioned is that Meditation cannot be only a one-hour practice a day or two-hour practice a…