Failure doesn't mean that you'll never succeed, but simply that you need more training .....
The difference between a 20 year old and a 50 year old is that, The 20-year-old still has plenty of time to correct the mistakes .So do not be afraid to fail, Whether that is what nobody wants. Have suffered through failure, You enjoy the sweet feeling of success. No one encourages you to fail,, but always be prepared to take a "step back" in any situation. When you pass it, you will be more mature.