To laugh often and much;
To win the respect of intelligent people and the affection of children;
To earn the appreciation of honest critics and endure the betrayal of false friends;
To appreciate beauty, to find the best in others;
To have played and laughed with enthusiasm, and sung with exultation;
To leave the world a bit better, whether by a healthy child, a garden patch or a redeemed social condition;
To know even one life has breathed easier because you have lived.
This is to have succeeded.
Ralph Waldo Emerson (There are various versions of this quotation around. I am not sure which is the correct version, however, this is the fullest version that I have seen. I think you get the gist...)