LEGO builder zgrredek has some fun with the Sacrament of Penance, more simply known as confession. The idea of confession in Christianity goes back to James 5:16 - "Confess your faults one to another, and pray one for another, that ye may be healed." In the Catholic tradition, the Church is held to be heir to the promise of Christ to his disciples in John 20:23 - "If you forgive anyone his sins, they are forgiven."
From the LEGO building standpoint, note that minifigs don't have knees, but here zgrredek has come up with two different solutions to get more realistic poses.
Found via Klocki, another LEGO blog.