Ambition proves costly in The Thorn Birds, as characters who chase greatness or selfish fulfillment often sacrifice their deepest relationships in the process. Father Ralph de Bricassart serves as the clearest example. As a young priest, Ralph finds himself torn between his romantic love for Meggie Cleary and his ambition within the Catholic Church. Ralph chooses ambition, and he rises through the ecclesiastical ranks, becoming a cardinal and papal legate—a path that earns him power but demands emotional denial. His relationship with Meggie becomes a haunting absence in his life, especially after he unknowingly fathers her son, Dane. Only after Dane’s death does Ralph learn the truth—and by then, it is too late. His ambition has bought prestige but cost him both love and fatherhood.
Luke O’Neill, Meggie’s husband, embodies a different form of ambition. Obsessed with financial independence and land ownership, Luke marries Meggie not for love but for her inheritance. He forces her into domestic labor, isolates her, and spends years cutting sugarcane to build toward his dream. In doing so, he forfeits any real connection with his wife or daughter. His ambition blinds him to the value of family until Meggie leaves him, rendering his efforts hollow. Though he achieves moderate success, he ends up alone, unable to recognize what he gave up along the way. Even Meggie makes sacrifices in pursuit of a different kind of ambition: the ambition to have something of Ralph, even if she cannot have the man himself. She engineers the conception of Dane and hides his true parentage for decades, choosing secrecy over honesty so that she can at least keep her son. In the end, The Thorn Birds suggests that while ambition is not inherently destructive, it becomes tragic when it asks people to give up what they love most to achieve it.
Ambition and Personal Sacrifice ThemeTracker

Ambition and Personal Sacrifice Quotes in The Thorn Birds
He kept his resentment from showing in his face; this parish had been excellent for his self-control. If once he was offered the chance to rise out of the obscurity his temper had landed him in, he would not again make the same mistake. And if he played his cards well, this old woman might be the answer to his prayers.
Curious, how many priests were handsome as Adonis, had the sexual magnetism of Don Juan. Did they espouse celibacy as a refuge from the consequences?
“Frank, I can never be free, and I don’t want to be free. I wish I knew where your blindness comes from, but I don’t. It isn’t mine, nor is it your father’s. I know you’re not happy, but must you take it out on me, and on Daddy? Why do you insist upon making everything so hard? Why?” She looked down at her hands, looked up at him. “I don’t want to say this, but I think I have to. It’s time you found yourself a girl, Frank, got married and had a family of your own. There’s room on Drogheda. I’ve never been worried about the other boys in that respect; they don’t seem to have your nature at all. But you need a wife, Frank. If you had one, you wouldn’t have time to think about me.”
“I am her husband. It is by God’s grace we are blessed with our children,” said Paddy more calmly, fighting for control.
“You’re no better than a shitty old dog after any bitch you can stick your thing into!”
“And you’re no better than the shitty old dog who fathered you, whoever he was! Thank God I never had a hand in it!” shouted Paddy, and stopped. “Oh, dear Jesus!” His rage quit him like a howling wind, he sagged and shriveled and his hands plucked at his mouth as if to tear out the tongue which had uttered the unutterable. “I didn’t mean it, I didn’t mean it! I didn’t mean it!”
“Why not? I’m tired of living, Ralph, and I’m going to stop.” Her hard eyes mocked. “Do you doubt me? For over seventy years I’ve done precisely what I wanted to do when I wanted to do it, so if Death thinks he’s the one to choose the time of my going, he’s very much mistaken. I’ll die when I choose the time, and no suicide, either. It’s our will to live keeps us kicking, Ralph; it isn’t hard to stop if we really want to. I’m tired, and I want to stop. Very simple.”
After you’ve read the will, you’ll understand what I mean. While I burn in Hell beyond the borders of this life I know now, you’ll still be in that life, but burning in a hell with fiercer flames than any God could possibly manufacture. Oh, my Ralph, I’ve gauged you to a nicety! If I never knew how to do anything else, I’ve always known how to make the ones I love suffer. And you’re far better game than my dear departed Michael ever was.
Father Ralph moved restlessly. He had not stopped to shed his Requiem vestments, nor had he taken a chair; like a dark and beautiful sorcerer he stood half in the shadows at the back of the room, isolated, his hands hidden beneath the black chasuble, his face still, and at the back of the distant blue eyes a horrified, stunned resentment. There was not even going to be the longed-for chastisement of rage or contempt; Paddy was going to hand it all to him on a golden plate of goodwill, and thank him for relieving the Clearys of a burden.
“Meghann, I’m an old-fashioned man,” he said.
She stared at him, puzzled. “Are you?” she asked, her tone implying: Does it matter?
“Yes,” he said. “I believe that when a man and woman marry, all the woman’s property should become the man’s. The way a dowry did in the old days. I know you’ve got a bit of money, and I’m telling you now that when we marry you’re to sign it over to me. It’s only fair you know what’s in my mind while you’re still single, and able to decide whether you want to do it.”
Because at last he understood that what he had aimed to be was not a man. Not a man, never a man; something far greater, something beyond the fate of a mere man. Yet after all his fate was here under his hands, struck quivering and alight with him, her man. A man, forever a man. Dear Lord, couldst Thou not have kept this from me? I am a man, I can never be God; it was a delusion, that life in search of godhead. Are we all the same, we priests, yearning to be God? We abjure the one act which irrefutably proves us men.
“Each of us has something within us which won’t be denied, even if it makes us scream aloud to die. We are what we are, that’s all. Like the old Celtic legend of the bird with the thorn in its breast, singing its heart out and dying. Because it has to, it’s driven to. We can know what we do wrong even before we do it, but self-knowledge can’t affect or change the outcome, can it? Everyone singing his own little song, convinced it’s the most wonderful song the world has ever heard. Don’t you see? We create our own thorns, and never stop to count the cost. All we can do is suffer the pain, and tell ourselves it was well worth it.”
“I’m going to be a priest,” said Dane. “I’m going to enter His service completely, offer everything I have and am to Him, as His priest. Poverty, chastity and obedience. He demands no less than all from His chosen servants. It won’t be easy, but I’m going to do it.”
The look in her eyes! As if he had killed her, ground her into the dust beneath his foot. That he should have to suffer this he hadn’t known, dreaming only of her pride in him, her pleasure at giving her son to God. They said she’d be thrilled, uplifted, completely in accord. Instead she was staring at him as if the prospect of his priesthood was her death sentence.