It definitely works similar to HEPA filters. Dwarves usually have long lifespans. It would be virtually impossible with all the contamination from dust, fine particles and other bad stuff in mines.

But in this case your "best" is whatever you decide it is. I am saying, not everything needs "your best". And if you are not doing "your best", it's still bringing value. You have time and everything for a full workout, but don't feel like it? You don't need to give it your best. Don't go into: it's either your best or nothing. The space in-between is fine as well. And motivational posts like the above one make it clear: give it your best. Always do your best. Which can be daunting and is unadvised.

Have priorities. Think about thinking and doing. Not everything deserves your best.

Do you need to do YOUR best with everything? Is YOUR half-ass not enough to iron a shirt, prepare a meal, exercise, call your close ones?

I know that YOUR best is different from others best, but you don't need YOUR best all the time. Moreover, sometimes YOUR half-ass is more than others best.

Absolute bullshit.

If it needs doing, it can be done bad. This is a better quote.

You need a lunch. Does it have to be perfect, from scratch, super tasty etc.? It just needs to be. You can order it somewhere, or cut corners and make it fast. You need to tidy the house - do it perfectly or not do it at all. Sad, because doing t half-assed still gives you pretty clean house. Of course, it could have been better, but maybe next week? You need to prepare to an exam. You can half-ass it and pass, or you can study hard and get 100%. With granny, you either go for 100% or do nothing at all.

Sometimes things require your 100% focus, attention, commitment. But you cannot always do that, you have to allow sometimes NOT TO be your best. When you know that you could have done it better, but right now you don't have the time, energy, money or whatever. Can't go to the gym for 2 hours? Go for 45 minutes. Can't finish the project at uni? Half-ass it, take it off of your list. Can't make yourself nice full breakfast? Eat oatmeal, a sandwich or some nuts. Don't be hungry. Can't iron your shirt? Just do barely nothing. Barely ironed shirt looks so, so much better than just grabbed from wardrobe.

It's not a perfect advice. Nothing is. But there are many, many, many situations where you are better with some result than no result, so very often it's better to half-ass something than to keep yourself from doing it until you can devote enough time/attention/resources.