I really like this quote because it reminds me that I should not overthink things about the future or past. Thinking about it only impacts me negatively. I want to be happy and by doing that I will have to live in the moment instead of the past or future.
I was just talking to my wise dad about this. Take pride in the hard work you have done even if you didn't get exactly what you want. You are stronger with every situation you have gone through and it makes you who you are. Everything has a plan and with every good/bad/disappointing experience you have gone through, you are going towards something great.