The Roe Deer has these characteristics, that while feeding it moves from
high places to even higher; with the keenness of its vision it chooses the
good plants from among the noxious ones; it is an herbivore that chews
the cud.
When wounded it runs to dittany, by the touch of which it is healed. Thus, good preachers, feeding on the law of the Lord and on good works, as if enjoying food,
ascend from virtue to virtue. They pick good thoughts out of the evil eyes of the
heart, and ruminate upon those chosen, that is, they examine the good and
commit the well chewed to memory.
Wounded by sin they run in confession to Christ and they are quickly healed.
Thus, Christ is properly called dittany, for as dittany draws the weapon fron
the wound and heals the wound, so Christ through confession, ejects the Devil
and pardons the sin.