Makes me think of how Marvin Minsky thought Meditation was a bad thing.
I've always found it interesting that many meditation techniques involve "emptying the mind" or "clearing the mind" of thought. While practicing concentration on a single point of focus definitely seems useful for strengthening the mind, I'm not sure that practicing a state of being completely devoid of thought is necessarily healthy. I would rather meditate on being full of thought, and thinking of many things simul…
For example, I might have some thoughts that are rooted in a specific desire. Perhaps I feel an urge to see what's new on Hacker News. I already did that 15 minutes ago, but so what. I'm thinking about what a great feeling it was last time I found something cool on this site. So I stop what I'm doing, navigate to Hacker News and proceed to waste 45 minutes reading through comment threads.
Of course, there's another option. I could simply ignore the desire and do something else- like whatever it is I had otherwise planned to do with that time. But this is not so easy. Chances are, I will succumb to the desire and then rationalize to myself that this is, in fact, how I planned to spend my evening the whole time.
With meditation, we practice by setting an unusual and specific intention, such as monitoring the breath. That way, if you notice yourself doing anything other than that, such as walking around, planning your weekend or replaying some event in your mind, you know that you are not doing what you intended to be doing. By returning to what you originally intended to do, you strengthen your ability to behave in an intentional manner, rather than being powerlessly yanked around by whatever idea happens to pop into your head at any given moment.
I'm not sure whether meditating for very long periods of time is healthy. But most of us struggle greatly to do it for even 10 minutes. That's because 10 minutes is longer than our attention span: even if we firmly resolve to pay attention to something for that long, we inevitably get distracted by something else within a minute or two, and completely forget what we were supposed to be doing in the first place. Don't you think that's troubling?