This paper follows up Bion’s development, focusing its attention on Cogitations in particular and suggesting that it can be read as a sort of new “Clinical Diary” à la Ferenczi. The authors, showing us both the link between the writings of the London Bion and those of the American one, stress the dramatic change that took place in his theoretical and technical position around about 1967, when he crossed the Atlantic for working and teaching in North and Latin America, and gradually arrived to formulate a kind of listening more authentically centered on his own thoughts and emotions and those of the patient during the analytic encounter.