The stresses on precision. Such certainty!

The diversity of the phenomena of Nature is so great, and the treasures hidden in the heavens so rich, precisely in order that the human mind shall never be lacking in fresh nourishment.
​- Johannes Kepler

If I call stones blue it is because blue is the precise word, believe me, and be equally assured that the color of stones can be very well distinguished by starlight.
- Gustave Flaubert, translated from French ("Si je mets bleues après pierres, c'est que bleues est le mot juste, croyez-moi, et soyez également persuadé que l'on distingue très bien la couleur des pierres à la clarté des étoiles")