What is success to you? Is it about being happy or wanting plenty of income? For me it would be that first one. Success changes when your goals and achievements change. You have to change your attitude if you want to be happy and successful.
Along the way to your goal you’ll always experience problems. But you can turn those problems into opportunity or be miserable for the rest of your life and fail at the running race. For us running successfully is not easy to do. But our new years resolution is to run a marathon within 4:30 hours. Now that might be a bit much of an ask but we will see.