Against the background of this consensus one appreciates the originality of Niche- las of Lyra. Rudolph of Saxony repeats it, together with a variety of details from historical and personal traditions. Of course the vigor and size of the sacred tree overwhelm secular plants. In varying formulations, this lore is repeated and allegorized throughout the Middle Ages. The Scholastics have more detailed information on the medicinal properties of mustard seed and their spiritual analogs in the Faith.
Some authorities extend the discussion of properties from the mustard seed to the resulting tree.
Richard of Saint-Victor calls hope the trunk of the tree of faith.