“I have only made this letter longer because I have not had the time to make it shorter."(Letter 16, 1657)”

“Reverend Fathers, my letters do not customarily follow one another so closely, nor are they usually so extensive. The little time I have had has caused both. I have made this one longer only because I have not had the leisure of making it shorter.”

“I made this [letter] very long, because I did not have the leisure to make it shorter.”

“I would have written a shorter letter, but I did not have the time.”

“I have never made but one prayer to God, a very short one: Oh Lord, make my enemies ridiculous. And God granted it."(Letter to Étienne Noël Damilaville, May 16, 1767)”

“Darling,You asked me to write you a letter, so I am writing you a letter. I do not know why I am writing you this letter, or what this letter is supposed to be about, but I am writing it nonetheless, because I love you very much and trust that you have some good purpose for having me write this letter. I hope that one day you will have the experience of doing something you do not understand for someone you love.Your father”