The Symbolism of Freemasonry (1869) by Dr. Albert G. Mackey is a classic, comprehensive exploration of the myths, legends, and symbols used by Freemasonry to teach moral and philosophical lessons. Mackey defines Freemasonry as a "science of morality, veiled in allegory, and illustrated by symbols," arguing that understanding these symbols is key to unlocking the fraternity's true philosophy. The Symbolism of Freemasonry is regarded as a vital text for understanding the intellectual foundation of Masonic thought. It serves as an essential guide for members and scholars looking to transition from a merely ritualistic understanding of the craft to a more profound "speculative" or philosophical comprehension.