Saint Maria Faustina Kowalska:

O my Jesus, each of Your saints reflects one of Your virtues; I desire to reflect Your compassionate heart, full of mercy; I want to glorify it. Let Your mercy, O Jesus, be impressed upon my heart and soul like a seal, and this will be my badge in this and the future life.

(Diary, 1242)

Through her, the Lord Jesus communicates to the world the great message of God's mercy and reveals the pattern of Christian perfection based on trust in God and on the attitude of mercy toward one's neighbors.