You can’t unring a bell: Once done cannot be undoneActions and words cannot be taken back. What is said or what is done cannot be undone. No one has the superpower to change the past. Once a word is spoken in haste, it can be forgiven but cannot be forgotten. It will remain as a wound in the heart of the victim. Similarly, if an action is done, then it is an unwritten rule that we have to face all the consequences as a result of our action. Uttering harsh words, missing opportunities, doing unkind actions without thinking, committing career mistakes, etc. are some common experiences in our lives for which we regret later. Once something is done, we regret either for what we have done or for what we have failed to do.
No one is perfect in this world. It is a human tendency to make mistakes and regret later. To avoid committing mistakes, one has to keep up the patience level and has to think before uttering a word or performing an action. Sometimes even after thinking for a long time, humans take a wrong decision and as a result of it we end up performing a bad action. So, at that time we have no other option than living the consequences. One of the least things what a person can do is 'regret' because regretting gives a clear picture of the confusing views of a situation and helps to clarify things. Also regretting an action makes a person humble. We cannot blindly say regretting as a sense of positivity; it may also lead to an action of negativity and create negative outcomes.
What is done can't be undone but life gives a do-over. Similarly, we can't unring a bell but we can grab a new chance and ring the bell again to create a perfect 'GONG' sound.