<human>:  Why is the Papal Encyclical Letter Gaudium et Spes called Gaudium et Spes?
<bot>: The Latin words Gaudium et Spes mean Joy and Hope. In the encyclical letter, Pope John XXIII explains the purpose of the encyclical. The Pope states that Gaudium et Spes is intended to help people “experience the joy of faith, hope, and charity.”