The reason ...

“The reason people find it so hard to be happy is that they always see the past better than it was, the present worse than it is, and the future less resolved than it will be” , “I've learned that people will forget what you said, people will forget what you did, but people will never forget how you made them feel.” , “Dream as if you'll live forever, live as if you'll die today.” , “If you are going through hell, keep going.”