Cicero, De Natura Deorum 1.4
“Many scholars of Greek studies were not able to communicate what they could teach to their own people because they were unsure that they could share in Latin what they had learned from the Greeks. But I think that in style we have made such improvement that the Greeks do not defeat us even in abundance of words.
The great sickness and heavy pain of our fortune also compelled my mind to this work. If I could have discovered any greater relief, I would not have taken refuge in this most potent comfort. Indeed, I was incapable of enjoying this in any other way that not merely reading books but also writing a monograph on all of philosophy.
We most readily come to learn every part of a subject and all of its parameters when all the questions are explained by writing. And philosophy, moreover, is a certain kind of marvelous continuation and series of things where different ideas appear to be interwoven with each other and they all connect in some way and are bound together.”
Complures enim Graecis institutionibus eruditi ea quae didicerant cum civibus suis communicare non poterant, quod ilia quae a Graecis accepissent Latine dici posse diffiderent: quo in genere tantum profecisse videmur ut a Graecis ne verborum quidem copia vinceremur. Hortata etiam est ut me ad haec conferrem animi aegritudo fortunae magna et gravi commota iniuria; cuius si maiorem aliquam levationem reperire potuissem, non ad hanc potissimum confugissem, ea vero ipsa nulla ratione melius frui potui quam si me non modo ad legendos libros sed etiam ad totam philosophiam pertractandam dedissem. Omnes autem eius partes atque omnia membra tum facillume noscuntur cum totae quaestiones scribendo explicantur; est enim admirabilis quaedam continuatio seriesque rerum, ut alia ex alia nexa et omnes inter se aptae conligataeque videantur.