Many people are not happy. They regret the things they did in the past. They worry about the things that will occur tomorrow. But they have choices. They have the power and ability to change these feelings. Our feelings come from our thoughts. And we can control our thoughts. We can remove negative emotions, improve our life in school and workplace, and build up healthy relationships. Happiness is a choice. Happiness arises spontaneously from sources within us. If we live fully in the present moment, we can appreciate our surroundings and are grateful for what we have. We can have peace in mind even during the COVID-19 Pandemic in 2020. This book is a collection of wisdom from many great people, scholars and experts in the field. Through them, we can learn how to live our life wisely, even in the face of adversity.