Wizards often stroke their beards as they think. Picture it — as in a Halloween costume. ‘Tis a trope of the genre — as with Merlin, Gandalf, and Dumbledore. Wizards don’t have to fit this image — but there’s a long tradition of bearded wizards, sages who clutch staffs, canes, walking sticks, wands. The particulars vary from culture to culture. Tolkien is said to have acquired the trope from an ancient Finnish epic called The Kalevala, at the heart of which is a mage named Vainamoinen — old, wise, long beard, performs magic using voice and song. Esoteric secrets and forgotten knowledges grant all such figures special powers, distinct from the powers of their peers.