Tonight, I’ll be reading from Albert Einstein’s, "The Meaning of Relativity". This compilation of Princeton lectures address the consequences of Einstein's theories of relativity. Einstein
developed these theories which became one of the two pillars of modern physics (alongside quantum mechanics). Special relativity applies to elementary particles and their interactions, describing all their physical phenomena except gravity. General relativity explains the law of gravitation and its relation to other forces of nature. It applies to the cosmological and astrophysical realm.