Book VII · 47

Look round at the courses of the stars, as if thou wert going along with them; and constantly consider the changes of the elements into one another, for such thoughts purge away the filth of the terrene life.

Watch the stars in their courses as one that runneth about with them therein; and think constantly upon the reciprocal changes of the elements, for thoughts on these things cleanse away the mire of our earthly life.