Definition from macmillandictionary.com
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We hope for her sake that the wedding goes as planned.
He agreed to resign for the sake of the party.
I’m not just doing this for my own sake, you know.
I hope you’re not doing this just for the sake of the money.
For clarity’s sake, I’d like to reword my statement.
So let’s say, just for the sake of argument, that you’re right.
Encourage your children to seek knowledge for its own sake.
I’m not just asking for the sake of it. I need an answer.
Oh, for goodness’ sake, leave me alone!