
“In the heavens, then, there is no chance, irregularity, deviation, or falsity, but on the other hand the utmost order, reality, method, and consistency. The things which are without these qualities, phantasmal, unreal, and erratic, move in and around the earth below the moon, which is the lowest of all the heavenly bodies. Any one, therefore, who thinks that there is no intelligence in the marvellous order of the stars and in their extraordinary regularity, from which the preservation and the entire well-being of all things proceed, ought to be considered destitute of intelligence himself.”
Nulla igitur in caelo nec fortuna nec temeritas nec erratio nec vanitas inest contraque omnis ordo veritas ratio constantia, quaeque his vacant ementita et falsa plenaque erroris, ea circum terras infra lunam, quae omnium ultima est, in terrisque versantur. caelestem ergo admirabilem ordinem incredibilemque constantiam, ex qua conservatio et salus omnium omnis oritur, qui vacare mente putat is ipse mentis expers habendus est.
Book II, section 21
De Natura Deorum – On the Nature of the Gods (45 BC)