There is an air which belongs to the figure and talents of each individual; we always lose it when we abandon it to assume another. We should try to find out what air is natural to us and never abandon it, but make it as perfect as we can. This is the reason that the majority of children please. It is because they are wrapt up in the air and manner nature has given them, and are ignorant of any other. They are changed and corrupted when they quit infancy, they think they should imitate what they see, and they are not altogether able to imitate it. In this imitation there is always something of falsity and uncertainty. They have nothing settled in their manner and opinions. Instead of being in reality what they want to appear, they seek to appear what they are not.

Reflections on Various Subjects (1665–1678)