Comment by crazygringo

The difference is whether it's a goal that is important to you.

If you encounter an obstacle and just stop without feeling frustrated, then you just didn't care much in the first place. That's fine. It's not laziness, it's just not valuing that particular outcome much.

Frustration is generally a very easy emotion to identify because you tense up, get irritated, have a feeling of wanting to shout or swear, growl, etc. Even if you're in a professional environment where you can't do those things, you feel the impulse to. There's no confusing that feeling with laziness.

"Laziness" is generally a value judgment imposed by a third party, that you're not doing the thing they value as important. An employer might think an employee is "lazy", when the employee thinks they're underpaid and chooses not to do anything above the bare minimum.