The full use of your powers along lines of excellence. (definition of happiness by John F. Kennedy)

An inconvenience is only an adventure wrongly considered; an adventure is an inconvenience rightly considered. (Gilbert Keith Chesterton)

Each problem that I solved became a rule which served afterwards to solve other problems. (Rene Descartes, Discours de la Methode)

I think ‘Hail to the Chief’ has a nice ring to it. (John F. Kennedywhen asked what is his favorite song)