It is undoubtedly fitting that after celebrating the Sacred Heart of Jesus we should, the very next day, celebrate the Immaculate Heart of Mary. Her heart is indeed most pure, and it burns for the conversion of souls to her Son.

For more on the Immaculate Heart of Mary, see the articles below.

O heart most pure of the Blessed Virgin Mary, obtain for me from Jesus a pure and humble heart!

Pax Christi,
phatcatholic

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The Immaculate Heart of Mary

• Auspicia Quedam (On Consecration to the Immaculate Heart of Mary)
• Benedicite Deum (On Fatima and the Consecration of the World to the Immaculate Heart)
• Act of Consecration of the World to the Immaculate Heart of Mary
• August Devotion: The Immaculate Heart
• Devotion to the Heart of Mary
• Devotion to the Immaculate Heart
• Devotion to the Immaculate Heart of Mary
• Through the Immaculate Heart of Mary
• Oneness of Heart with Mary: The Way to Divine Grace
• Saturdays and the Immaculate Heart of Mary
• What Is the Meaning of Consecration?

As for my own meager attempt, see Defending the Immaculate Heart.