Summa TheologiaePart I — First PartQuestion 071 — Question 71 — The Work of the Fifth Day A A Question 71 — The Work of the Fifth Day We must next consider the work of the fifth day. Chapter 424 of 3726 ← Previous Article 3 — Whether the lights of heaven are living beings? Next → Article 1 — Whether the work of the fifth day was fittingly described?