This book is the Dhamma talks by Venerable Hwal-Seong Sunim, who has long endeavored to adapt the original teachings of the Buddha to the Abhidhamma of our age. Focusing on the exquisite structure and dynamic relationships of the Four Noble Truths, it reexamines the core teachings of Buddha, and shows that Buddhism transcends time and place and is very relevant to our time. Readers will benefit from his unparalleled insight and wise approach to the world and our own problems.