what is the significance of a ear of corn?

An ear of corn serves primarily as an emblem of plenty, abundance, and the fruits of honest labor 34. In the biblical context from which the symbol is drawn, the word denotes grain generally—such as wheat or barley—rather than modern maize 3.

Within the lodge, an ear of corn is associated with the Hebrew word Shibboleth, which carries the dual meaning of an ear of grain and a stream or flood of water, both signifying abundance 31. Together with wine and oil, corn formed the symbolic wages of the ancient craft 3. While these represent physical wages in sacred history, they signify spiritual nourishment, sacrifice, and the rewards earned through personal labor and moral effort 3. In Masonic processions, corn is carried in a golden pitcher to highlight its status as a primary necessity and the "staff of life," holding greater honor than the comforts represented by wine and oil 1.

Beyond its general association with plenty and sustenance, mystical writers attach further symbolic meaning to the grain. Walter Leslie Wilmshurst interprets the ripening corn as a representation of the candidate's early spiritual growth, fertilized by divine light and inspiration as he seeks control over his lower nature 2.