Our minds have an endless stream of thoughts that pop up trying to grab our attention. There is no way to prevent a thought from popping up over and over again. But you can JUST FLUSH IT out of your mind at a quick glance so it can't keep hurting you over and over again.
When a negative thought pops up you don't have to open yourself up to the avalanche of thoughts that would pour in if you JUST FLUSH IT OUT OF YOUR MIND. It's like seeing a cockroach come out of your grocery bag. If you don't squish it immediately your house will be totally infested with roaches.
You may have had no choice to live through the negative situation the first time, but you can choose to not relive it over and over again in your mind. So at a quick glance JUST FLUSH IT OUT OF YOUR MIND So it can't hurt you over and over again.
The rollercoaster of life is full of ups and downs as well as twists and turns. You will have good days and bad days. If you want to enjoy life you have to enjoy it while you are living it. Which means to have a good day there are times when you have to FLUSH AWAY A BAD DAY so you can enjoy life while you are living it.
The past is already gone, tomorrow may never come but TODAY is yours to enjoy.