It is requisite for the relaxation of the mind that we make use, from time to time, of playful deeds and jokes.
Source: In Quotations to Cheer You Up When the World is Getting You Down, by Allen Klein, 1991.
-- Thomas Aquinas, ( 1225-1274), Italian theologian, philosopher; Angelic Doctor; noted for his synthesis of theology and philosophy known as Thomism in Summa Theologie, c.1265.