This volume contains a contribution written “by four hands” (the reference here is to the computer keyboard, not the fountain pen; it is thus written much like playing the piano, with two hands). It is a dialogue that took place over a period of about a year (between April 2014 and April 2015) on Facebook and serves as a follow-up to a previous exchange (see the volume Corrispondenze). In these new conversations, which range from physics to metaphysics, from scientific research to spirituality, from religion to faith, and more, numerous other voices join those of Misha and Maksim (Michele and Massimiliano).