"Let me tell you something you already know.The world ain’t all sunshine and rainbows. It’s a very mean and nasty place, and I don’t care how tough you are, it will beat you to your knees and keep you there permanently if you let it. You, me, or nobody is gonna hit as hard as life. But it ain’t about how hard you hit, it’s about how hard you can get hit and keep moving forward. How much you can take and keep moving forward. That’s how winning is done!

Now if you know what you’re worth, then go out and get what you’re worth! But you gotta be willing to take the hits. And not pointing fingers saying you ain’t where you wanna be because of him, or her, or anybody! Cowards do that and that ain’t you! You’re better than that!"

-Rocky Balboa

This quote and specially the part in bold letters are specially true when it comes to pursuing an aviation career. There will be setbacks along the road but as long as you don't let the setbacks kick you to the ground you will eventually succeed.
The second is also extremely important. No one but you can get you where you want to be, stay true to your goals!

I just wanted to share this since it has kept me moving forward when facing setbacks and hardships.