"A hot summer day spent pruning roses isn't pleasant — there's a lot of sweat and blood involved. But there's a very real sense of accomplishment when you're done.
You turn around and see the hundreds of plants you just cleaned up, and you know without a doubt that you've done something. It's a tangible sense of progress.
Humanity, I believe, is wired to crave that kind of accomplishment. Desk jobs don't deliver it.
Which is why my coworker is building a LEGO rocket in his home office."