This book is a completely revised edition of one of the most popular works of the Thrice-Blessed Pope Shenouda III. His Holiness delivered these four lectures on the virtue of calmness at the Cathedral of St. Mark in Cairo and later at the Monastery of Abba Bishoy in Wadi El Natrun in 1983.To help modern readers appreciated the depth and wisdom of His Holiness8217 words, this book features a carefully revised version of the original English translation.