Some call it stick to-it-iveness.  Others call it  stubbornness.  For you it may be goal driven or the refusal to  give up.  It has a lot of different names.

It is a trait of those who succeed. They never give up.

There are many people who will work toward something as long as it is easy. When things get tough, they back down, quit and make excuses for doing so.

The key is to not give up on the end goal. We may need to choose a different road or a different approach but the end goal remains the same

The picture show the construction of a railroad through rough terrain using what, today, we would call primitive equipment. Most of our railroads were built this way.  The were our first cross country transportation systems and are still heavily used today. Think where we would be if they had quit.

Yes, persistence does pay.  As you go through the week, if it is worthwhile, stick to it.  Persist and persevere.