re-post
Why would someone say selfishness is the ultimate sin? When you think on it, you will realize that it really is. From selfishness, there is theft. From selfishness, there is strife between people and nations. From selfishness, there is even murder and war.
Jesus I believe knew that selfishness was this bad as well. Why I say that is how he framed the statement “Do unto to others, as you would have others do unto you.” You see he framed the wording to come from a selfish person’s perspective. Why? Become he was talking mostly to the sinner. How YOU wish to be treated is how YOU should treat others and if YOU do so, YOU will receive it.
This is a major point in what I post on these blogs. I mention selfishness many times. I mention that we are not to be selfish and are to do as the gold rule states. If we truly practice this type of behavior everywhere every day this world would truly be a better place.
Just take for example an everyday event like going through the drive through window at a fast food restaurant. I will give you two examples and you decide which is selfish and which is not.

Person A gets into line then places their car in park to save gas. Cars in from of them move up as other cars behind them pull in to get food. The person parked lets three car lengths open before them and then decides to look up from their cellphone to see the that line has moved. They then slowly move up. They then place their order, taking several minutes to do so. Then they finish and the line in front of them moves up to three car lengths again. They then again look up from their cellphone and slowly move up, stopping a full car length behind the person in front of them. When they finally arrive at the window, they get their food and then set there several minutes examining their food. They attempt to give back the food but it is given right back since it is what they ordered. They then pull away from the window slowly. (This is an actual occurrence I witnessed)

Person B pulls in the line in the drive thru. The car in front of them moves up and so move up with them. The person in front of them gets to the point to order their food. Person B looks at the menu from where he/she sets and decides what they wish to order. The person in front moves forward and they move up and quickly order their food then proceeds to move up behind the person in front of them allowing the person now behind them to order their food. Person B keeps the line moving. When they get to the window they have their method of payment ready and receive their food then pull away.
The selfish person’s actions can cause others about them to become angry. They do not care, for all that is important to them is themselves. When people only care for themselves then they are not thinking of God first and so are not truly Christian if they profess to be one. Actions speak louder than words. It is these actions, which we are all to stand to account for on the day of final judgment. Who will get to live an eternity traveling the universe and who will live forever in an uncomfortably warm place?