Success in all aspects of life is determined by individual attitude and lifestyle, hence this book is an important piece for training young adults to develop the necessary habits needed for success in life and destiny with a good emphasis on marital success. This book is a course material designed to follow the 21/90 rule to help systematically change youth's lifestyles from what is the norm in society to what the word of God requires. The mystery of marriage is well elucidated, it helps to understand the importance, purpose, and various dimensions of marriage. Lifestyle change will in turn develop the young adults into becoming better leaders that have a great impact on their world.