This short book provides an introduction to the writings of philosopher Jose Ortega y Gasset (1883-1955), by looking closely at his work entitled "What is Philosophy?" which redefines philosophy for a new era. The author Oswald Sobrino provides original translations from the beautifully written Spanish used by Ortega and provides commentary that guides you, step-by-step, through Ortega's dramatic and vital redefinition of philosophy. This book will hopefully be the first in a series commenting on Ortega's very readable and well-written works. For Ortega, the radical reality that philosophy addresses is our life together with the world around us, with our circumstance. Hence, Ortega's famous dictum that "I am I and my circumstance." Ortega, with literary flair, paints a picture of the drama and urgency of the life of each one of us facing the challenges of our own particular circumstances and a picture of how freedom and decisive responsibility oriented to the future are crucial to our very existence."