Most Beloved Lord Father
Signor Geri [the Grand Duke's private secretary] informed me of the conditions imposed on you on account of your affair, Sire, that alas you are detained in the chambers of the Holy Office; on the one hand this gives me great distress, convinced as I am that you find yourself with scant peace of mind, and perhaps also deprived of all bodily comforts: on the other hand, considering the need for events to reach this stage, in order for the authorities to dismiss you, as well as the kindliness with which everyone there has treated you up till now, and above all the justice of the cause and your innocence in this instance, I console myself and cling to the expectation of a happy and prosperous triumph, with the help of blessed God, to Whom my heart never ceases to cry out, commending you with all the love and trust it contains.
The only thing for you to do now is to guard your good spirits,
care not to jeopardize your health with excessive worry, but to direct
your thoughts and hopes to God, Who, like a tender, loving father,
abandons those who confide in Him and
appeal to Him for help in time of need. Dearest lord father, I wanted to write to you now, to tell you I partake in your torments, so as to make them lighter for you to bear: I have given no hint of these difficulties to anyone else, wanting to keep the unpleasant news to myself, and to speak to the others only of your pleasures and satisfactions. Thus we are all awaiting your return, eager to enjoy your conversation again with delight.
And who knows, Sire, if while I sit writing, you may not already find yourself released from your predicament and free of all concerns? Thus may it please the Lord, Who must be the One to console you, and in Whose care I leave you.
From San Matteo, the 20th day of April 1633.
Most affectionate daughter,
S. M. Celeste
Source: Galileo's Daughter: Letters and Essays by Dava Sobel