WATCH: Pope Francis on how the world can achieve peace

VATICAN CITY  — In this video released by the Vatican on Tuesday (Manila time), Pope Francis reveals the "way" to peace in a homily during a Mass at the Casa Santa Marta near St. Peter's Basilica.

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"Merciful men and women have a wide, wide heart: always forgiving others and thinking about their [own] sins. This is the way of mercy for which we must ask. But if all of is, if all people, individuals, families, neighborhoods, had this attitude, how much peace there would be in the world -- how much peace in our hearts! Because mercy brings us peace. Always remember: 'Who am I to judge? Have shame and enlarge your heart. May the Lord give us this grace."