Pacheco states that the circumcision of the Christ-child was made by Virgin Mary. The author afterward declares that the way of painting this scene should be represented from that moment onwards, although he recognises the way of painting it might be seen as new.

Stating that there is a lot to warn the painters, Pacheco analyses the iconography of the circumcision of Christ, considered by the author as one of those who the painters exercise with greater ignorance in the place, in the accompaniment, in the minister, and other circumstances.