Tertullian
Major theologian in the early Christian church, known for his powerful denunciations of many influences he considered heretical, including the widespread admiration of pagan philosophers and many Gnostic ideas, yet in later life a Montanist, and thus he himself an embracer of beliefs that came to be declared heretical.
Quippe res dei ratio quia deus omnium conditor nihil non ratione providit disposuit ordinavit, nihil [enim] non ratione tractari intellegique voluit. Igitur ignorantes quique deum rem quoque eius ignorent necesse est quia nullius omnino thesaurus extraneis patet. Itaque universam vitae conversationem sine gubernaculo rationis transfretantes inminentem saeculo procellam evitare non norunt.
Often quoted as "It is so extraordinary that it must be true."
Omnia periclitabuntur aliter accipi quam sunt, et amittere quod sunt dum aliter accipiuntur, si aliter quam sunt cognominantur. Fides nominum salus est proprietatum.