She knew from a young age that her sole 'purpose' (in life) was to be a writer. [=she knew that all she wanted (in life) was to be a writer]
We were happy to know that the money was being used 'for a good purpose'. [=for something useful, important, etc.]
There's little/no 'purpose' in restarting the process. [=there is little/no reason to start the process again]
(..) I mean, it's amazing that I've gone this far without ending up like one of them. Well, Richard, you have. That's what's important, right? And you are here for a reason, for a purpose. You just have to figure out what it is. How can you have so much faith, Paige? I mean, with everything out there, (..)2004 TvShow: Charmed Title: I Dream of Phoebe Season: 6 Episode 15