St. Thomas Aquinas
Aquinas on whether there
can be a virtue about games?
(Q.) Must one attribute to the virtue of modesty whatever has reference to games and recreation
which are part of the economy of human life?
(A.) Yes; and this virtue then goes by another name, which is that of eutrapelia;
and this virtue effects that a person plays,
amuses, or recreates himself as it behoves,
avoiding both excess and defect (CLXVIII. 2-4).
Source: "Catechism of the Summa Theologica of Saint Thomas Aquinas For
Use of the Faithful", pp. 202-203, By R.P. Thomas Pegues, O.P., Imp. 1922