stick the course

Then why get involved, why spend the money, the lives, if you're not prepared to stick the course?

All that has to be shown here is determination by sticking the course out and not stopping or walking.

"What do you mean, I won't stick the course?"

He knows now that at the bitter end, Magnus, you won't stick the course."

There is a huge, long-term benefit to us all in sticking the course and that's exactly what this Coalition Government's going to do.