There is often high praise attached to being able to “live in the moment”. When you think about it such a philosophy is just existentialism in the extreme. Cows and trees live in the moment. They’re just there. Humans by contrast inhabit this whole other numinous universe that allows them to scan back across time, back to the origins of everything, as well as to project forward into the future. They can speculate about what might be in store and even make plans accordingly.

Many of the things that are useful and worthy to people - science, the arts, religion, complex social and legal systems - all come from not living in the moment but from being outside it. They come from living in a world of possibles, of plans, aspirations, imagination and vision. This is one of the central factors which differentiates humans from everything else in existence.

So, living in the moment is all very well, and one understands its attraction as a state of mind to be advocated but as a bigger philosophy of life it makes no sense. Living in the moment all the time would mean an immediate return to prehistory. Probably not a good thing.