The author disusses the possible sources of the the sermon On Cheesefare Saturday. A Sermon by the Humble Monk and Presbyter Gregory Dedicated to the Reverend Fathers who shined in Lent, and more precisely she seeks sources of Gregory Tsamblak’s mentioning of ancient philosophers, authorities, stories, aphorisms, images, motifs. She finds parallels in Suidas and in the so-called Serbian Alexandria. Donka Petkanova concludes that Gregory Tsamblak borrowed mostly facts and images from the ancient sources but interpreted them in his own way demonstrating the superiority of Christian spirituality and Christian holy men.