“To attain happiness in another world we need only to believe something, while to secure it in this world we must do something
“The happiness of a man in this life does not consist in the absence but in the mastery of his passions
“There is only one way to happiness and that is to cease worrying about things which are beyond the power of our will.
“To keep the heart unwrinkled, to be hopeful, kindly, cheerful, reverent that is to triumph over old age