Why why we do this type of things in our life which we regret after loosing. We have to understand it's or their value when they are with us. We always take for granted them never give time or respect what they deserve we always waste our time with someone who doesn't care or know our value.
When we have valuable people we just ignore them and saying that they iurritat us. We always see their mistakes and try to find out their demerits which is very brutal from us because they are the relation which we make our own self or god make for us.
How we don't know their value or don't want to understand. When they are with us we never gave them time which is very important because in today's pandemic time someone just want you to give your time to them your small amount of time is so vital for them. When someone alive we never have time to appreciate their quality or never make them understand that how important they are for us. If we say this to them which is not according to me take so much time just say it because today's time we never know what next happened to us or them. Just say sorry or what their things which you don't like just say this is not very difficult because after regretting is very painful. If We just have their bad memories which you can change by just saying truth to them and make them also feel that they are special for you which you remember your whole life.
And many people say that do good things when you are alive so that when you gone people remember you with those good memories but in my point of view people should also have to talk about someone when they are alive so that those who are dead know what they are for us and what they are doing in their life is also very good. After they leave whatever you it doesn't matter. Because when they are between us you are not say those good words for them.
Lastly just love and praise or feel proud what you have before loosing them. So that you never have any regret in your life and those you are gone also live happy where they are.