The track is filled with all the means of reaching your goal. It's HOW things are done. This is where you want to be flexible - about how your purpose is achieved. Because you'll keep finding better means for HOW to make your goal happen. Stay alert to recognize when the track is adjusting - by working dynamically with your challenges.
Challenges are the adjustments.
They also test your determination, asking you to get stronger. If so, your challenges are helping you to become the person who can fully live out your goal. If not, it's possible your challenges are here to ask you to look again-only closer this time. This is something to look at for your milestone achievement, and even for the bigger picture. Just seek to get a little clearer vision- bring it into closer focus.