Even after saying all of these and realising all of it, I still do not feel motivated to put into action something that will change my next second in life for the better. All of these "theories" or concepts that people come up with are actually based on many assumptions too, just like in economics, where there are no external factors and that everything is perfect. Sometimes perfect isn't really perfect in the sense that it only considers the circumstances and situation where "perfect" was used, but will not qualify to be "perfect" any more when one experiences more in life or upon looking back. It sometimes makes looking back at something we deem to be perfect very painful, knowing that perfect is no longer perfect.
Does this make a case for the people who choose to give up everything in life just to forget the perfect memories of the past by getting wasted on alcohol or to start afresh in a foreign place where there is nothing the resembles or can conjure the memories of the past? I don't know but I realise that it would be good if there is some way to block out thoughts or stop the brain from thinking (temporarily). Sometimes thinking too much does not help a single bit and it might be better not to think at all. As for now, the only method I know which works is to sleep but falling asleep is the tough part.
On another note, I think that I have unconsciously found out that it is not worth remembering the past because as I have said, nothing can be the same. There is no way I can ever relive the days where I am satisfied having a sweet to eat or relive the happiest days of my life again. Remembering the things I have to do is much more important. Having said that, it is not that I do not treasure those good and happy times. It is just that life has to go on and there is no way to hang on to those memories.
Going back to my point on those theories, hardly any of them accurately takes into account external factors such as how people will react. In fact, it is not possible to do so because no two people will have the exact same reaction to a similar situation. Every one thinks differently and there are billions of possibilities as to how people will react. It is true that the theories can apply loosely to the situations stated, but whatever the outcome is, there is no way to predict exactly.
I shall stop here for now.