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]
(..) just like that, eh? That's how it's gonna be, man. You think that's good? That's how you want to do it? That's how you want to leave it? I just have to find a purpose. A traitor? A Judas? Why? What was it about? Michael! You want to go inside, bro? We gonna start soon. (..)2014 The Dark Horse
(..) Who you don't even know whether they can even play! Yeah. Gen! I can help them. They'll have a purpose. They need a purpose, a focus. Who knows what'll happen? I know what will happen. You'll rev them up with some new and exciting idea, (..)2014 The Dark Horse