Success usually comes from a string of failed attempts. That's not to say that we failed it just means we had not quite perfected what was needed for our goal to be achieved.
The designers of the aeroplane had a number of prototypes as well as models that just did not fly. Having a model that didn't fly was not classed as failure in their eyes, it was just about finding out what stopped it from flying. They didn't focus on what it did not do but kept their eyes on what it could do and continued to chip away until eventually they had a model that flew.
Also what we ought to recognise is that when it flew it didn't go for the length of journey that planes do now; it just flew. That was their aim and they achieved it, so now they could develop it further. Many of us focus on what didn't happen and so it can block us from finding the solutions we need and often leads to us giving up on our goals. This is just one example of persistence, but reminds us to keep our focus on what we are trying to achieve.
If you have lost focus of any of your goals because of what didn't happen, be encouraged today to know that you can still achieve your goal.
Just like the creators of the plane, your dream may not have taken off yet, but that does not mean you have failed. Revisit your dream or goal and reflect on what went right. Identify what you can do now to improve on that and go for it.