There's a saying that goes something like:
Never half ass anything. Always use your full ass.
Is there another succinct way of expressing this in more polite language?
I think there are a number of concepts conveyed simultaneously, to varying degrees:
- Don't be lazy.
- Fully commit to what you do.
- As @jim points out in the comments, "If it's worth doing, it's worth doing right."
- Take responsibility for your actions, or perhaps, take pride in your work.
- Pick and choose your battles. Or perhaps, don't spend time on things that don't matter.