Introduction: Unfortunately, it is a general observation that a large portion of today's Orthodox Christians are not sufficiently informed on matters of faith, worship, and life. They have only limited knowledge, sometimes incorrect, and even contradictory to what the Church of Christ teaches, based on the Holy Scripture and its long Tradition.

This observation is not ours. It is expressed or stated by official voices of its shepherds and ecclesiastical publications. Bishops have declared before the Hierarchy Synod: "There are sermons, both oral and written, but what is happening after all, that ultimately our people remain uninstructed? What is to blame?" (magazine "Church" 2010, p. 405).

"Our people are uninstructed and let us ask again if this observation honors us, as well as who is responsible for the lack of instruction of our people" ("Church" 2013, p. 171).

Without intending to undermine, even in the slightest, our ecclesiastical shepherds in their prophetic work, nor to ignore the existence of very important and lengthy books by great authors who have dealt with the relevant topics (which we recommend for study), in this current Series of short pamphlets we offer to the willing clergy – as an aid to their work – and lay readers, a concise "bouquet" of texts that are easily read, understandable, do not cost much (in a time of crisis), and aim to provide the necessary knowledge to every Orthodox Christian.