Until when should you persevere?

Originally published on my blog.

There are multiple quotes around perseverance (and images similar to the one in the post), and I'm all for it because I tend to believe that most people give up too soon. However, until when should you be pivoting (fancy word for failing)? Until your run rate goes dry, until Nth pivot, until x event? What are the N and/or x?

This is why I write these 'daily thoughts' posts.