Pascal, Pensées #355
Princes and kings sometimes play. They are not always on their thrones. They weary there. Grandeur must be abandoned to be appreciated. Continuity in everything is unpleasant. Cold is agreeable, that we may get warm.
Nature acts by progress, itus et reditus. It goes and returns, then advances further, then twice as much backwards, then more forward than ever, etc.
The tide of the sea behaves in the same manner; and so apparently does the sun in its course.