When I once prayed before the Blessed Sacrament on a day of the Octave of Corpus Christi (June 1675), His love granted me quite extraordinary graces, and I felt the burning desire to reciprocate this love at least a little. [...]
Then He said to me:
Behold this Heart which has loved mankind so much that it spared itself nothing, but gave itself completely and consumed itself to prove its love to them. As reward I receive from most only ingratitude, through the coldness and contempt they show Me in this sacrament of love. Yet what grieves Me most is that souls consecrated to Me also treat Me thus. Therefore I ask you that a special feast in honour of My Most Sacred Heart be instituted on the first Friday after the Octave of Corpus Christi. On that day Holy Communion shall be received and solemn reparation shall be made to Me to atone for the outrages committed against the Most Blessed Sacrament of the Altar [...]. I promise you that My Heart will overwhelm with the stream of His divine love those who honour It and work so that others may do so too. [1]

Most Sacred Heart of Jesus, Source of all good,
I adore You, I believe in You, I hope in You, I love You and repent of all my sins. I give You this my poor heart; make it humble, patient, pure and in accord with all Your wishes. Grant, O good Jesus, that I may live in You and You in me. Protect me in dangers, comfort me in tribulation and sorrow. Grant me health of body, Your blessing on all my works and the grace of a holy death. Amen.
(Benedict XV, Brief 4.12.1915)

Whenever something painful, sad or unjust befalls you, say to yourself:
Accept it, the Most Sacred Heart of Jesus sends it to you so that you may be more deeply united with Him. Thus you will preserve the peace of heart that surpasses all riches.
(St. Margaret Mary Alacoque)

[1] This is the last and most significant of the four "great revelations" of the Most Sacred Heart of Jesus to St. Margaret Mary. From: Saint Margaret Mary Alacoque, Life and Revelations, Freiburg, Switzerland, 1994.

1. I will grant them the graces necessary for their state in life.

2. I will give peace to their families.

3. I will comfort them in all their afflictions.

4. I will pour abundant blessings on all their undertakings.

5. I will be their sure refuge in life and above all in the hour of death.

6. Sinners will find in My Heart an ocean of mercy.

7. Lukewarm souls will become fervent.

8. Fervent souls will quickly advance to great perfection.

9. I will bless the houses in which an image of My Most Sacred Heart is exposed and honoured.

10. I will give priests the grace to convert even the most hardened sinners.

11. The names of those who promote this devotion will be written in My Heart and never blotted out.

12. I promise you in the excess of the mercy of My Heart that My all-powerful love will grant to all those who receive Holy Communion on nine consecutive first Fridays of the month,[2] the grace of final penitence. They will not die in a state of disgrace nor without receiving the holy sacraments. My divine Heart will be their sure refuge. [3]

[2] Provided we are in a state of sanctifying grace (reception of the sacrament of penance).
[3] After the revelations of the Most Sacred Heart of Jesus to St. Margaret Mary Alacoque (1647–1690).
Imprimatur: Freiburg, Switzerland, 15.10.1950, l. Waeber, vic.gen.

Good intentions are like pearls that shine from the innermost of a person. In this sense St. Gertrude of Helfta establishes the principle that the Lord accepts the will for the deed.

When she once prayed for a person who could not finish a task assigned to her, the Lord instructed her:
The pure intention or desire of this person, who has undertaken this work despite the difficulties that confronted them in order to fulfill My will, is very pleasing to Me, and I accept their good will for the deed itself. Even if the work were not to succeed, I would grant them the same reward as if they had accomplished it.

Place all your sufferings in My Heart, and I will bestow upon them the greatest perfection, for the benefit of the whole Church.
(Jesus to St. Gertrude of Helfta)

On the Feast of the Epiphany St. Gertrude wanted to offer the Lord gifts like the Holy Magi, and as she found nothing worthy to offer Him around her, she began with restless desire to traverse the whole world, gathering all false myrrh, all false frankincense, all false gold – that is, all prayers, sufferings and actions that do not bear the seal of submission to the divine will and therefore cannot please God. All this she transformed in her heart through the fire of her desire, as through the fire of a crucible, and offered it to the Lord as divine myrrh, fragrant frankincense and precious gold. The Lord received her gift with great pleasure and said to her:
Behold the pearls you have just offered Me. I receive them with such joy because of their rarity that I will wear them on the diadem of My head before the whole heavenly court as a memorial of your extraordinary love.

What an excellent means of atonement and reparation, both for us and for the whole Church, the Lord offers us in these exercises that He taught His beloved disciple. Let us gather together all the vain, useless and wrongful things of our life and cast them with holy desires into this fiery furnace of the Heart of Jesus, and everything will be purified and transformed there. (Cf. Is 1:25)

Let us also cast with holy desire all thoughts, words, works and sufferings of all humanity that are not for God into the wounded Heart of Jesus, and we will afford Him abundant comfort for so many squandered graces. [4]

[4] Cf. Love, Peace and Joy in the Heart of Jesus by Fr. Andreas Prévot, Imprimatur: Limburg, 16.7.1927.

Jesus also explained to Sr. Josefa Ménendez what glorious fruits flow from our pure and loving intention, saying to her:

Those who live in constant union with Me glorify Me and work greatly for the benefit of souls. When they perform work that has little value in itself, but dip it in My Precious Blood and unite it with the work I Myself performed during My earthly life, how much fruit will it bear for the salvation of souls; perhaps more than if they had preached to the whole world! Whether they study, speak or write, whether they clean, sew or rest: as long as the activity is not determined by whim but regulated by obedience and duty and performed in intimate union with Me, it is fruitful for souls. I wish people would understand this so much. It is not the action in itself that determines its value, but the intention with which it is performed! [...] My love goes so far that souls can gain great treasures from the smallest things. When in the morning they offer their whole day in union with Me and earnestly desire that My Heart make use of them for the salvation of souls, when they fulfill all their duties out of love, hour by hour and minute by minute, how many treasures they gather in one day! To such souls I will reveal My inexhaustible love more and more. [5]

[5] From: The Call of Love, Message of the Heart of Jesus to Sister Josefa Menendez, p. 279 ff., Imprimatur: Freiburg, Switzerland, 5.1.1952, L. Waeber, vic.gen.

One must offer God one's work, one's steps, one's rest.
O how beautiful it is to do everything for the dear God.
Come, my soul, when you work, God blesses your work and every step ...
O how beautiful it is to offer oneself to God every morning ...

St. John Vianney, Curé of Ars

Divine Heart of Jesus,
through the Immaculate Heart of Mary I offer You everything that I pray, work, sacrifice and suffer today in the name of all and for all souls of the triple holy Church, in that intention with which You Yourself unceasingly pray and offer Yourself on our altars for the salvation of souls. Amen. [6]

[6] Imprimatur of the Archdiocese of Salzburg, Prot. No.1698/17, August 22, 2017.

Merciful Redeemer!
Humbly kneeling at Your feet we renew the consecration of our family to Your divine Heart.
Be always our King; we place our full, unrestricted trust in You.
May Your Spirit penetrate our thoughts, our desires, our words and deeds.
Bless our undertakings, share in our joys, our trials and our labours.

Grant that we may know You ever better, love You ever more and serve You steadfastly.
From one end of the world to the other may the cry resound:
May the triumphant Heart of Jesus be loved, praised and glorified always and everywhere. Amen.

Most Sacred Heart of Jesus, I trust in You!
Most Sacred Heart of Jesus, I believe in Your love for me!
Most Sacred Heart of Jesus, Your kingdom come to us! [7]

[7] "The family consecration must penetrate life, [...] We must invite Him to bless the morning and the evening, [...] our smile and our tears: Lord, dwell with us, as if You were at home here; be our King, our Friend, our Confidant, our Counsellor. [...] Nothing should happen without You; our sufferings and joys, our fear, our sorrow, we want to share everything with You." (Fr. Mateo). From: The Enthronement of the Sacred Heart by Fr. Engelbert Recktenwald, Wigratzbad, 1996.
Imprimatur: Freiburg, Brisg., October 12, 1953, Hirt, vic.gen.

O Jesus, through Your love-glowing Heart
I beg You, inflame with zeal for Your love and glory all priests in the whole world,
all missionaries, all who proclaim Your divine word.
Grant them the grace that they,
inflamed with holy zeal,
snatch souls from Satan,
to lead them all to Your Heart,
where they may glorify You forever!
Amen. [8]

[8] This prayer was dictated by Jesus to Sr. Josefa Menendez on the Feast of the Sacred Heart, June 3, 1921. From: The Call of Love, p. 141.