"You have 86,400 in your account, and someone stole $10 from you, would you be upset and throw all of the $86,390 away in hopes of getting back at the person that took you $10? Or would you move on and live? See, we have 86,400 seconds in every day so don't let someone's negative 10 seconds ruin the rest of the $86,390."
This one of my favorite quotes. It reminds me to stop and think about what is essential, and what won't matter in the long run. There are many ways that this quote can be applied. It could be that someone said something nasty, or perhaps it might even be that you let your day get ruined because you forgot to do your high school math homework.
If someone says something rude to you, don't let it get to you.
Otherwise, by wasting your day feeling bad, you're allowing the other person to win. That person wanted their comment to bother you. If you ignore them and go about your day as nothing happen, then you win. Don't let your day get ruined just because of their negativity.
While this quote is explicitly talking about if someone else I negative, I also think of my negativity and how it affects myself. If you're like me, you might worry over a lot of things. Sometimes, I forget not to let such little things bother me. I over-analyze things way too much, and I hate to admit it, but it can ruin my day sometimes. I might think someone is mad about me when I later find out that they're just having a bad day. One time in high school during my orchestra final exam, I zoned out and forgot in the middle what scale I was playing. Since I had to start over, I jumped to the conclusion that it would majorly affect my exam grade, and I let it affect the rest of my day. During my other exams, I was thinking about my orchestra exam. I should've just focused on what I was doing at the moment. I couldn't change what had happened, and thinking about it negatively certainly wasn't going to change anything.
Don't dwell on the past, because you can't change it. You can't make someone take that hurtful comment back, or change the fact that you failed that chemistry quiz. What you can do is make sure that the hurtful comment doesn't affect your day, continue to be positive, and study more when your next chemistry quiz comes up.
Focus on the present and never let negativity affect your day.