Exactly, we have to live at the moment and know that we wont live more than a limited and short time, we dont even know if we will be alive one minute later, If all the humans could understand that, we wouldn't have wars for resources or for races or ... , for example think if government of a country take all the resources from a country from another part of the world and keeping it in their country, how long that government or those people will live there? in history we have read and seen how people of each country moved to another place and changed it and made that place theirs, who knows what will happen in future.