In 1915 Albert Einstein started writing this booklet in an attempt to provide readers who do not necessarily possess knowledge of theoretical physics with an accurate understanding of one of the highest intellectual achievements of the human mind, the theory of the relativity. This friendly brain-challenge is written in the form of a dynamic dialogue, yet it also requires a substantial intellectual effort from the reader. In this important scientific document, the reader is taken on a journey through Einstein’s special and general relativity theories.

This is a non-technical introduction two the two pillars of 20th century physics: the Theory of Relativity and Quantum Mechanics. It presents a conceptual and philosophical discussion without entering the realm of complicated mathematics, focusing on natural sciences in general, and physics in particular.