“Without causality in the world, there is no point in educating people, or making any moral or political appeal.”

“Teaching the layperson (divulgare) is not distorting (tergiversare) the subject, but educating the public; and it is our duty as scientists to educate without distorting the essence of the scientific knowledge attained by humanity. The future of our society depends upon this premise.”

“The past and the future are not a collection of instants shared by all space, but a collection of events that correspond to a possible relation of causal order with the present event.”

“Both space and time are metrically amorphous, i.e. they do not have - despite how strongly we believe so - an inherent metric which would allow us to measure them without any definitions. In this sense, thus, neither space nor time is absolute.”

“The universal character of the centrifugal forces leaves us impotent as to discern whether what is going on inside the carrousel is because we are rotating with respect to terra firma (remember my eyes are closed), or because – for some unknown reason unrelated to motion – radial gravitational field has temporarily emerged while the carrousel is as in repose as it was before the given impulse. The latter would have certainly been the interpretation adopted by an intelligent being, had s/he been born and grown up inside the carrousel, without any access whatsoever to the exterior world.”

“When we say two bodies 'touch', what we mean (without knowing it) is that both electromagnetic fields are interacting to avoid physical interpenetration and ... that happens well before subatomic particles touch!”

“Such is how Science makes progress: not destroying the past, but learning from it, and building on it.”