If it's not okay in a vacuum but you justify it when someone does something bad to you first, be careful that, if you're wrong about what the other person did, you're not doing something abhorrent.
https://yourmeaninginlife.com/blog/sacrificing-your-ethics-for-your-ethics
You decide what meaning the events in your life have to you.
https://yourmeaninginlife.com/blog/you-can-find-meaning-in-whatever-happens-to-you
Asking where you see yourself in five years is a good exercise to determine both where you're going and what you want to be doing today to reach your desired future state.
https://yourmeaninginlife.com/blog/where-do-you-see-yourself-in-five-years