The concept of relativity, as noted in Walter Isaacson's biography of Einstein, is straightforward yet profound. It suggests that the fundamental principles governing physics apply consistently, regardless of the observer's state of motion. This insight revolutionizes our understanding of time and space, illustrating how they are interconnected and influenced by the observer's perspective.

Einstein's relativity fundamentally changed the scientific landscape by demonstrating that measurements of time and distance are not absolute but rather dependent on the observer's velocity. This shift in thinking challenges traditional notions of physics and highlights the importance of a relative perspective in understanding the universe.