This quote comes from the Gettysburg Address. The Gettysburg Address is a speech that was delivered by President Abraham Lincoln during the Civil War. The speech was delivered at the dedication of the Soldiers' National Cemetery in Gettysburg, Pennsylvania.
In this speech, Lincoln urges the crowd to think of the soldiers, and of how bravely they fought at the Battle of Gettysburg. Lincoln reminds the audience that words do not matter much (<em>"the world will little note, nor long remember what we say here"</em>) but that action means everything (<em>"but it can never forget what they did here"</em>). In this way, he encourages the audience to think very highly of the soldiers, and to appreciate their sacrifice and their courage deeply.
Im not sure there is such a thing . Doing for others makes us happy so when we do it we are making our self's happy so it is kind of selfish but selfish in a good way.