"If you want to take power over everything, give power over yourself to reason! You will command many if your mind commands you." The book presents "Moral Letters to Lucilius" - the result of the life reflections of the famous ancient Roman stoic philosopher Seneca Lucius Anney (about 4 BC - 65 AD, Roman politician, philosopher and writer), a man who, by his death, proved loyalty to the ideals of his life.