Concerning the necessity of logic

Epictetus – Discourses Book 1
I.17. Concerning the necessity of logic

Logic is at the head of the Stoic curriculum because it is a useful tool in weighing and measuring abstractions.

We can use logic to analyse concepts and terms, and forestall any uncertainty as to their meanings.

But we should keep in mind that logic is only a tool for interpreting nature. Logic does not create truth by itself; but through logic we may better understand God and the will of nature.