I think Freddy pretty much sums it up with this one. On a more serious note, I think you put out as much as you can and get as much as you can out of life or you're failing. Sometimes though, the things that you put what you feel is "enough" into give you not enough or more than enough back and that is kind of what shapes your life and the things you choose to do, like to do, and/or need to do. I am also under the impression that if you don't want to put more than just "enough" into something, it probably is not worth doing and unless the benefit increases or outweighs the effort , it is something you will abandon or get rid of because as a human you naturally want to learn and progress, which 'content' or just 'enough' tends to be stagnant and boring.