If I ask you all "Do you have everything that you need in your life?" I am sure your answer will be "No" with some extensions added to it saying "I need this, I need that etc etc." In short at present, we are not happy and content with what we have with us. We hardly realize that our life is already full and complete but the problem is we are not thankful for what we have and lose the small joys in hope for the bigger happiness. We are simply running behind our big wishes, needs and career without even noticing the real happiness that we have beside us. It doesn't mean that you need to stop and sit and enjoy your life with what you have. It means you need to be slow, feel content, spend time with what you are blessed with and steadily move forward in your life. We humans struggle for no reason i.e once our needs are fulfilled we stress ourselves and start hunting for luxuries. Progress is a good thing in one's life but it should not happen ...
Acceptance is an important part of serenity and a key to lead a healthy life ahead... :)