This book is compiled based on the most common questions about faith and spiritual life asked to priests. It tells in an accessible form how to prepare for the Sacraments, how to confess correctly, and what you need to know about preparing for Holy Communion, and how to communicate with a spiritual mentor. It also talks about what you need to know about fasting and prayer, worship and remembrance of the dead. It also tells how it is appropriate to participate in the pilgrimage and how to celebrate Orthodox holidays. All these points were highlighted by famous Orthodox priests within the framework of the “Father Online” project, answering a variety of questions from readers. The book includes the most important thing, what is asked first. The book will be of interest to both churchgoers and new Christians - people who are just starting to go to church and are keenly interested in Orthodoxy.