My dear Pollob, 
Take my Salam and love. Your letter dated 01.02.2021, is to hand. I learnt from it that you want to know the importance of practicing good manners in life. 

Now-a-days young boys and girls do not care to behave well with people. Most of the time, they behave rudely with elderly people which goes against our ethics and principles. They become violent for a trifling thing. If we do not behave well, we can not expect others to do the same things to us. There is a famous saying that treat people the way you want to be treated. Remember, good manners cost nothing but buy love, honour and respect. I would like to suggest you to give up bad habits. Follow each and every rule that is prescribed in our Holy Quran. If you practice these good manners, you can become a good human being. You can gain people's trust and be happier in your life. Good manners develop your personality, increase your confidence. I thereby suggest you to develop good manners and lead a successful and happy life. 

No more today, convey my best regards to parents. 

Your loving
Pronay