Faustina stated that Jesus also promised that anything can be obtained with this prayer if it is compatible with His will. In her diary Faustina recounted a vision in which she saw an angel sent to a city to destroy it. Faustina began to pray for God's mercy on the city and felt the strong presence of the Holy Trinity.After she prayed, the angel was powerless to harm the city. Faustina learned that the prayers she spoke were to be taught to all the people of the world.