How does the Trestle Board relate to Masonic teachings and moral values?

Operative masons hewed materials, raised walls, and constructed edifices according to the architectural designs laid down on the trestle board of the master workman 1. In speculative Masonry, these physical plans symbolically represent the moral plans and guidelines of life by which a Mason constructs a spiritual temple 1.

The trestle board serves as a symbol of natural and moral law 1. Speculative Masons are taught to erect their spiritual edifice in obedience to the precepts and commands laid down by the Grand Architect of the Universe in the great books of nature and revelation, which together constitute the spiritual trestle board 1. The application of this symbol is universal and tolerant, allowing each Mason to interpret the revealed will of his Creator through his own sacred texts, such as the Holy Scriptures, the Old Testament, or the Koran 1. Because an atheist rejects a Supreme Being, he is viewed as necessarily lacking a spiritual trestle board on which divine designs can be inscribed for his moral direction 1.

Masonic legend also refers to tablets used by Hiram Abiff as a trestle board 1. While unauthenticated historically, this traditional account functions symbolically to inculcate the duty of every man to direct his daily conduct according to a design that constructs a spiritual temple within himself 1.