During the First week of the Long Lent, most probably between the end of 1403–1406 as an abbot at the Neamt Monastery Grigoriy Tsamblak gave a Speech about fasting and tears, and honest icons. The present research the doctrine of the ortodox preacher for the Christian feat of the fasting, which he systematizes and explaines in the Speech according to the tradicions from the church and the holy homeland tradicion. Indicated is the biblical metatext basis and are fixed some intertextual connections with Byzantine and Old Bulgarian authors, which suggests the Bulgarian man of letters during his early creative years as an erudite theologian from the Middle Ages.