“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.”

“The present is not an instant shared by all space, but an event, i.e. an instant at a place in space.”

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

“One of the various theories proposed to explain the negative result of the famous Michelson-Morley experiment with light waves (conceived to measure the absolute space), was based on the ballistic hypothesis, i.e. on postulating that the speed of light predicted by Maxwell's equations was not given as relative to the medium but as relative to the transmitter (firearm). Had that been the case, the experiment negative results would have not caused such perplexity and frustration (as we shall see in forthcoming sections).”

“Subjectivity is strange to Science, while Relativity is an objective part of it.”

“The objective and merit of Einstein's theory is to identify those physical magnitudes which are absolute, i.e. common for all Inertial Frames, distinguishing them from those which are a mere perspective, only shared by those observers in repose within a given Inertial Frame.”

“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.”