Think before you speak; use your speech for good; avoid saying anything hurtful or damaging to others .

This hadith speaks to the power of words and how they can have a lasting impact. It emphasizes the importance of being careful with what we say, as our words can be remembered and repeated by others. Al-Hasan was surprised at his own remark, which shows that even he was not aware of how far his words could reach. This hadith teaches us to think before we speak, as our words can have a lasting effect on those around us. We should strive to use our speech for good and avoid saying anything that could be hurtful or damaging to others.