Many critics have focused on the role of David as planner of Solomon's Temple and his possible role with the Freemasons.[140] Although it is not known for sure whether Christopher was a Freemason or not, there is evidence suggesting that he was either part of the organization or had a strong knowledge of its belief system.[187] Based on personal admittance to contributing to A Defence of Freemasonry, contemporary verification of his participation in the volume and with Masonic meetings, there is enough to confirm "his participation in Masonic affairs."[188] Furthermore, there are accounts of Smart attending meetings at the Bell Tavern in Westminster.[188][189] The information available has led Marie Roberts to declare in her 1986 book British Poets and Secret Societies, "It has been universally accepted by scholars that Christopher Smart [...] was a Freemason yet no record of his membership has been traced."[190] However, in the notes to Chris Mounsey's 2001 book Christopher Smart: Clown of God, Marie Roberts' 1986 book is referred to as "an account of Smart's work which accepts his association with the Freemasons," but in Mounsey's view, "Since neither Smart's name nor his pseudonyms appear in the records of the Freemasons, it is highly unlikely he was ever one of their number."[191]
Smart's involvement with Masonry can be traced through his poems, including Jubilate Agno and A Song to David, with his constant references to Masonic ideas and his praise of Free Masonry in general.[192] In Jubilate Agno, Smart declares "I am the Lord's builder and free and accepted MASON in CHRIST JESUS" (B 109). This declaration of being a "free and accepted MASON" has been interpreted to define his connection to speculative Masonry. The "in Christ Jesus" declaration places Smart within a Christian version of Masonry. He also declares himself as "the Lord's builder" and this connects his life with the building of King Solomon's Temple, an important Masonic idea. In A Song to David, Smart returns to the building of Solomon's Temple and incorporates many of the Masonic images that he uses in Jubilate Agno