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This "Living in the moment" stuff has depth such that many books have been written on it. It is one of the premises of mindfulness meditation, and Buddhism thoroughly explores this. The summary is that you will be more satisfied if you are not continuously ruminating on the past, or anxiously anticipating future problems, but instead focus on your immediate happiness. e.g. Right now you are comfortable, not in any pa…
I think it depends on whether you want to feel like a good person, or be a good person. Living in the moment lets you feel better, because there's less to consider. Constantly examining yourself and those around you allows you to better react to those surroundings (even if some people don't act on it for various reasons, one of which might be getting too caught up in the examining and never doing). Like literally eve…
What happens instead is that if you are in the moment, you can much more easily see and feel which things actually exist in the current moment for you to consider, and to actually react to those surroundings that actually matter, instead of those that have been served up by the internal dialog which is based usually on worries, fears, ego beliefs etc. Living in the moment does not make you live like an animal. It makes you appreciate and focus on that which truly matters for you, instead of distractions that a constantly thiking mind always throws at you and makes you feel like everything is says matters and is very important.
Those things that are truly worth considering, already exist in the moment. If you have a real need or want to do something today - it will be in the moment and it will present itself. It is a total nonsense that a person "living in the moment" can never complete any complicated task, accomplish a complicated goal or plan for the future when that is required. - And that is being a good person, not simply "feeling like one".