John Locke Quotes about Happiness

A sound mind in a sound body is a short but full description of a happy state in this world.
1693 Some Thoughts Concerning Education, opening words. See Juvenal 453:20.
John Locke, Ruth Weissbourd Grant, Nathan Tarcov (1996). “Some Thoughts Concerning Education: And, Of the Conduct of the Understanding”, Hackett Publishing