§13.31.1C. Flavio, honesto et ornato equite R., utor valde familiariter fuit enim generi mei, C. Pisonis, pernecessarius meque diligentissime observant et ipse et L. Flavius, frater eius.
I am on very intimate terms with Gaius Flavius, an honorable and distinguished Roman knight; for he was very closely connected with my son-in-law, Gaius Piso, and both he himself and his brother, Lucius Flavius, treat me with the utmost respect.
quapropter velim honoris mei causa, quibus rebus honeste et pro tua dignitate poteris, quam honorificentissime et quam liberalissime C. Flavium tractes.
Therefore, I would like you, for the sake of my honor, to treat Gaius Flavius as honorably and as generously as possible, in whatever ways you can with propriety and in keeping with your dignity.
id mihi sic erit gratum, ut gratius esse nihil possit.
This will be so gratifying to me that nothing could be more gratifying.
§13.31.2sed praeterea tibi adfirmo (neque id ambitione adductus facio sed cum familiaritate et necessitudine tum etiam veritate) te ex C. Flavi officio et observantia et praeterea splendore atque is inter suos gratia magnam voluptatem esse capturum.
But besides this, I assure you (and I do not do this prompted by self-seeking, but both from intimacy and close relationship, and also from truth) that you will derive great pleasure from Gaius Flavius's sense of duty and respect, and furthermore from his distinguished position and his influence among his own people.
vale.
Farewell.