More on today's solemnity here.
Sixteenth century Calvinism and seventeenth century Jansenism preached a distorted Christianity that substituted for God's love and sacrifice of His Son for all men the fearful idea that a whole section of humanity was inexorably damned.
The Church always countered this view with the infinite love of our Savior who died on the cross for all men. The institution of the feast of the Sacred Heart was soon to contribute to the creation among the faithful of a powerful current of devotion which since then has grown steadily stronger. The first Office and Mass of the Sacred Heart were composed by St. John Eudes, but the institution of the feast was a result of the appearances of our Lord to St. Margaret Mary Alacoque in 1675. The celebration of the feast was extended to the general calendar of the Church by Pius IX in 1856. ...
...The deepest longing of Christ's Heart is that we discover how much he loves us, the extent of his tender love for creatures who, cooled by their selfishness, look only inwards at themselves, as if they were afraid to let themselves be loved unconditionally by their Creator, who asks nothing and gives all!
How society, culture, economy, politics today need this Heart! It is really true, the more man distances himself from God-Love the more he becomes 'heartless', agitated about a thousand things because he has mislaid the principal one: to let oneself be loved by Christ and to respond to this Love with our love.
Prayer to the Wounded Heart of Jesus (courtesy of EWTN):
Prayer to the Wounded Heart of Jesus
O my Most Loving and Gentle Jesus, I desire with all the affections of my heart, that all beings should praise Thee, honor Thee and glorify Thee eternally for that sacred wound wherewith Thy divine side was rent. I deposit, enclose, conceal in that wound and in that opening in Thy Heart, my heart and all my feelings, thoughts, desires, intentions and all the faculties of my soul. I entreat Thee, by the precious Blood and Water that flowed from Thy Most Loving Heart, to take entire possession of me, that Thou may guide me in all things. Consume me in the burning fire of thy holy Love, so that I may be so absorbed and transformed into Thee that I may no longer be but one with Thee.
-- Lanspergius, the Carthusian