[Affolfembonge]

Thinking bad words happens to many people, not only you. I had this problem as well in the past.

1. The Bhudda practiced for a very long long time in the wheel of rebirth to be able to teach people to get out of this wheel of rebirth. He would not be angry on you at all. On the contrary, he would expect you (in fact, everyone) to follow him to get out of the wheel of rebirth.

2. Although he would not be angry on you, you are suffered already for your past thinking. So, please stay at present, whatever happened in the past, you have to let it go. It you rethink about it, your mind will repeat the similar feeling, and you will be suffered again and again. Not because of your past thinking, but because of thinking at present.

3. The bad words in your mind were not intentionally created by youself. But they occurred by themselves, and you cannot prohibit them. This is because your mind is not-self. If your mind is self, you will be able to order it to think only good words. But in reality you cannot do so. So, if this happens again, you should understand that those words come by their own, you do not say or support them. Although your mind says them, you do not say or support them. (because your mind is not self.) Then, you will gain more knowledge by seeing the truth of your mind that your mind is not permanent, and not-self. It changes by itssefl and you cannot control it.

4. Although we cannot control our mind, we can train it. If we always think and say good words, our mind will get familiar with them, and will rarely think about bad words. On the contrary, if we always think and say bad words, our mind will get familiar with them, and will easily think about bad words.