"And you Sagredus, although in the Discourses past you have many times, with great applause, declared, that you were pleased with some of my conjectures, yet do I believe, that that was in part more occasioned by the novelty than by the certainty of them, but much more by your courtesie, which did think and desire, by its assent, to procure me that content which we naturally use to take in the approbation and applause of our own matters... your civility hath obliged me to you..."
January 1, 1970
https://en.wikiquote.org/wiki/The_Systeme_of_the_World%3A_in_Four_Dialogues