Even if your most recent failure was a complete failure of your company, that's ok. Sometimes we need company failure to discover more about what really inspires us, or to learn how to effectively validate products and services. I had a couple company failures that were essential for my growth as a human being and led to what I am doing today. Company failure is certainly challenging, but it does not mean you are a failure. It's all about learning and growth. That's the game of entrepreneurship and life in general.
Here are some journaling questions to support you in freeing yourself from the limitations of a fixed mindset.
Cheers - Justin