Cultivate the habit of being grateful for every good thing that comes to you, and to give thanks continuously. And because all things have contributed to your advancement, you should include all things in your gratitude.
Ralph Waldo EmersonDon't hang a dismal picture on the wall, and do not daub with sables and glooms in your conversation. Don't be a cynic and disconsolate preacher. Don't bewail and bemoan. Omit the negative propositions. Nerve us with incessant affirmatives. Don't waste yourself in rejection, nor bark against the bad, but chant the beauty of the good. When that is spoken which has a right to be spoken, the chatter and the criticism will stop. Set down nothing that will not help somebody.
Ralph Waldo Emerson