St. Catherine of Siena...Part of her Letter to Pope Gregory XVI to urge him to return to the seat of the legitimate successors of Saint Peter, Rome:

Holiest sweet father of mine, I see no other way for us and no other aid to winning back your sheep, which have left the fold of Holy Church in rebellion, not obedient nor submissive to you, their father. I pray you therefore, in the name of Christ crucified, and I will that you do me this grace, to overcome their malice with your benignity. Yours we are, father! I know and realize that they all feel that they have done wrong; but although they have no excuse for their crimes, nevertheless it seemed to them that they could not do differently, because of the many sufferings and injustices and iniquitous things they have endured from bad shepherds and governors. For they have breathed the stench of the lives of many rulers whom you know yourself to be incarnate demons, and fallen into terrible fears, so that they did like Pilate, who not to lose his authority killed Christ; so did they, for not to lose their state, they maltreated you. I ask you then, father, to show them mercy. Do not regard the ignorance and pride of your sons, but with the food of love and your benignity inflict such mild discipline and benign reproof as shall satisfy your Holiness and restore peace to us miserable children who have done wrong.

Diary of St. Faustina....the Promise for Those Who Suffer Like Jesus..

At the same time, I saw a certain person [father Sopocko] and, in part, the condition of his soul and the ordeals God was sending him. His sufferings were of the mind and in a form so acute that I pitied him and said to the Lord, “why do you treat him like that?” and the Lord answered, for the sake of his triple crown. and the Lord also gave me to understand what unimaginable glory awaits the person who resembles the suffering Jesus here on earth.

That person will resemble Jesus in His glory. The Heavenly Father will recognize and glorify our soul to the extent that He sees in us a resemblance to His Son. I understood that this assimilation into Jesus is granted to us while we are here on earth. I see pure and innocent souls upon whom God has exercised His justice; these souls are the victims who sustain the world and who fill up what is lacking in the Passion of Jesus. They are not many in number. I rejoice greatly that God has allowed me to know such souls.

St. Padre Pio and the Cross..

Padre Pio, Secrets of a Soul:

"When Jesus wants me to understand that He loves me, He allows me to savor the wounds, the thorns, the agonies of His passion...When He wants to delight me, He fills my heart with that spirit which is all fire; He speaks to me of His delights. But when He wants to be delighted, He speaks to me of His sorrows, He invites me -- with a voice full of both supplication and authority -- to affix my body [to the cross] in order to alleviate His suffering. Who can resist Him? I realize how much my miseries have caused Him to suffer, how much I have offended Him. I desire no other than Jesus alone, I want nothing more than His pains (because this is what Jesus wishes). Let me say--since no one can hear me--I am disposed to remain forever deprived of the sweetness Jesus allows me to feel.

I am ready to suffer Jesus hiding His beautiful eyes from me, so long as He does not hide His love from me, because then I would die. But I do not feel I can be deprived of suffering--for this I lack strength. [...] Perhaps I have not yet expressed myself clearly with regards to the secret of this suffering. Jesus, the Man of Sorrows, wants all Christians to imitate Him; He has offered this chalice to me yet again, and I have accepted it. That is why He does not spare me. My humble sufferings are worth nothing, but Jesus delights in them because He loved [suffering] on earth...Now shouldn't this alone be enough to humiliate me, to make me seek to be hidden from the eyes of men, since I was made worthy of suffering with Jesus and as Jesus? Ah, my father! I feel too keenly my ingratitude toward God's majesty."

Diary of St. Faustina...on the Profession of Vows

Today is the renewal; that is, the profession of vows in the course of a solemn celebration. As the sisters were making their vows I heard angels singing in various tones, "Holy, Holy, Holy," with chanting so delightful that no human tongue could ever match it.

In the afternoon, I talked with my beloved Mother Directress of Novices, Mother Mary Joseph. We walked once around the garden, and I was able to have a talk with her, although it was a rather general one. She is ever the same beloved Mother Directress of Novices, although she is in fact no longer the directress, but a Superior, and it is already ten years since I pronounced my vows. She told me that it is not impossible for a religious to live without the cross. However, she revealed to me a certain suffering which I had experienced in Warsaw, although I had never told her about it. All the graces which I had received during the novitiate came back vividly before my eyes of my soul. Oh, how grateful I am to her! When my soul was plunged in darkness, and it seemed to me that I was damned, she wrenched me from that abyss by the power of obedience.

My soul is often burdened with suffering, and there is no human being who can understand these torments.