I'm constantly afraid of getting fired from my job.
Why are you afraid of getting fired?
I take a lot of risks at work that could get me fired.
You seem to be doing things you think put you at risk for being fired. That's a bad idea. If you get fired, you may not be able to support yourself.
You're right. I was wrong in my behavior before and will be a better employee in the future.
I'm glad that you are taking my advice! Being a good employee will make you feel better because you will feel secure in your job and won't have to worry about being fired. You are doing a good thing by changing your behavior!