4 Suppose that I wish to write down in my note books this or that silly trifle, or to make comments upon the scriptures, to retort upon my calumniators, to digest my wrath, to practise myself in the use of commonplaces and to stow away sharp shafts for the day of battle. So long as I do not publish my thoughts, they are only unkind words not matter for a charge of libel; in fact they are not even unkind words for the public ear never hears them. You may bribe my slaves and tamper with my clients.
You may, as the fable has it, penetrate by means of your gold to the chamber of Danaë; and then, dissembling what you have done, you may call me a falsifier; but, if you do so, you will have to plead guilty yourself to a worse charge than any that you can bring against me. One man inveighs against you as a heretic, another as a perverter of doctrine. You are silent yourself; you do not venture to answer; you assail the translator; you cavil about syllables and you fancy your defence complete if your calumnies provoke no reply.
Suppose that I have made a mistake or an omission in my rendering. Your whole case turns upon this; this is the defence which you offer to your accusers. Are you no heretic because I am a bad translator? Mind, I do not say that I know you to be a heretic; I leave such knowledge to your accuser, to him who wrote the letter: what I do say is that it is the height of folly for you when you are accused by one man to attack another, and when you are covered with wounds yourself to seek comfort by wounding one who is still quiescent and unaggressive.
Source: Letters (New Advent)