Hello/Goodbye, in my opinion, is just a continuation of the story involving the life of Michael Young History and his desire to eventually become The Cool. The easiest way to decipher the song is to think about it in a sense of The Cool trying to choose between "darkness" and "all the time", being The Game and The Streets kind of lifestyle, versus "sunshine" and "not at all", which is the exact opposite.
Hello/Goodbye, in my opinion, is just a continuation of the story involving the life of Michael Young History and his desire to eventually become The Cool. The easiest way to decipher the song is to think about it in a sense of The Cool trying to choose between "darkness" and "all the time", being The Game and The Streets kind of lifestyle, versus "sunshine" and "not at all", which is the exact opposite. You have to relate it to the first verse of The Coolest which really explains how Michael Young History is trying to choose between staying with his current pregnant girlfriend and life, or whether he should rather follow the foot steps of The Game, The Streets and the gangster lifestyle. Obviously in The Coolest, Michael Young History chooses to pursue The Game's corrupt and dark lifestyle which leads him into evolving into The Cool. In Hello/Goodbye, The Cool has finally figured out that The Game's lifestyle is corrupt and not for him or his fellow followers. The "weather" in the song represents everything coming down on The Cool in life and what influences him to make decisions in life. Therefore, when "the weather is better than ever, I hope it last forever" it means that The Cool has finally figured out what he wants to do in life and that returning to his old lifestyle is a much better option than being at where he is in his life today. The Cool now realizes that it is time to leave or say "goodbye" to The Game's lifestyle. Where Lupe states, "we are targets" he is referring to The Cool and other people just like him in the same situation. The "targets" in this situation represent the potential followers that The Game has set out to spread his lifestyle and influences to.
The second verse is very complex. Basically, Lupe is relating a group of soldiers set out on a mission, compared to the path that The Cool and fellow followers of The Game are planning to take to, in a sense, de-throne The Game. "He once was a hero they don't love him no more" is an explanation of how The Cool has come to realize that The Game's lifestyle is not for him and he needs to move on. "His gift for not fighting another man's war" is saying that The Game's death is near due to the fact that he never fights his own battles and just sends out his followers to do his dirty work. The rest of the verse simply relates back to The Game's former followers and The Cool acting as if they are a group of soldiers set out on a mission. As it turns out, they have all turned on The Game and they have set out to kill him. The plan is to restore the so called "mask" that Lupe refers to. The "mask" in simple terms is the image and representation of The Game and what he portrays. If The Cool and The Game's former followers can replace the illusion of The Game and his portrayal, they can possibly restore the belief that everything in the streets can be safe again. "He stand to find himself surround by thousands of soldiers that he once trained to never miss their targets" is
Lupe's way of describing the irony of how The Game now faces death from his former followers.
As the rest of the song plays out Lupe again is just saying goodbye to The Game's lifestyle from the point of view of The Cool. And its great how he says "definite uncool" to close out the song because it really summarizes the entire point of the song which is how The Cool is no longer pursuing The Game or that type of lifestyle. Immediately following Hello/Goodbye is the song The Die. I'm sure you've heard the song and can decipher the basic meaning of that song although its much better to recognize the reasoning of Hello/goodbye before getting a complete grasp on The Die.