Never grow weary of the Cross
The Lord speaks much about sufferings to Saint Faustina. She suffered much through humiliations and through physical illness. And Jesus never tired of reminding her that her sufferings take on great power when united to His Cross. This message must never be forgotten. Though suffering may not be a “happy” topic, it is a joyous one when properly understood. When you realize that your sufferings can act as an instrument of the Mercy of God in the world, you will not hesitate to embrace them and to unite them to Christ. Never doubt this sacred instrument of God’s Mercy (See Diary #1612).
Devotion to the souls in Purgatory contains in itself all the works of mercy, which supernaturalized by a spirit of faith, should merit us Heaven. de Sales