This quote by Jean Giraudoux recommends that those who are thought about to be mediocre are the only ones who have the ability to regularly carry out at their best. This indicates that those who are considered to be remarkable or exceptional are not able to preserve their level of quality. It could be translated as a criticism of those who are thought about to be remarkable, as it suggests that they are unable to maintain their level of excellence. It might likewise be analyzed as a criticism of mediocrity, as it implies that those who are thought about to be average are the only ones who have the ability to consistently carry out at their best. Ultimately, this quote suggests that mediocrity is the only way to accomplish consistent quality.
"Don't lower your expectations to meet your performance. Raise your level of performance to meet your expectations. Expect the best of yourself, and then do what is necessary to make it a reality"
"The man who makes everything that leads to happiness depends upon himself, and not upon other men, has adopted the very best plan for living happily. This is the man of moderation, the man of manly character and of wisdom"