Pope Francis has hit out at hypocritical Christians in his new book, saying that mercy is more important than doctrine, and those who judge others are forgetting the real message of God.
The Pope also defends his radical views on gay people, which have divided the Catholic church, in his new book 'The Name Of God Is Mercy'.
In the 100-page book, he argues that God prefers sinners who repent over self-righteous moralisers who don't.
Francis condemns what he calls the "scholars of law", people who follow the scriptures too rigorously and have looked for fault in others but fail to see their own shortcomings.
He attacks the rigorists who focus on doctrine and have challenged Jesus' message of unconditional love and mercy, arguing that God prefers sinners who repent over self-righteous moralisers who don't.
"These are men who live attached to the letter of the law but who neglect love; men who only know how to close doors and draw boundaries," Francis is quoted as saying.
"We must avoid the attitude of someone who judges and condemns from the lofty heights of his own certainty, looking for the splinter in his brother's eye while remaining unaware of the beam in his own," Francis says. "Let us always remember that God rejoices more when one sinner returns to the fold than when 99 righteous people have no need of repentance."
Francis has a history of dismissing of theological and legalistic arguments stressing doctrine over his more pastoral message of mercy for society's most marginal groups. The clash in approaches has been particularly evident in recent church debates over marriage and divorce.
The book is is a 100-page conversation with Italian journalist Andrea Tornielli, being published this week in 86 countries to help kick-start Francis' Holy Year of Mercy.
In the book, Francis insists that his now-infamous "Who am I to judge" comment about gay people was merely a repetition of the church's teaching on homosexuality.
He won praise from gay activists with the comment, uttered during his first press conference in 2013. But many conservatives have criticised the remark as vague and incomplete since church teaching also holds that gay acts are "intrinsically disordered."
Francis says the church has long held that gay people should be treated with dignity and respect and seen as individuals. And he goes to some length throughout the text to cite scripture and previous popes to make clear that his radical agenda is fully rooted in the church's basic teachings.
"People should not be defined only by their sexual tendancies: Let us not forget that God loves all his creatures and we are destined to receive his infinite love," he says. "I prefer that homosexuals come to confession, that they stay close to the Lord, and that we pray all together. You can advise them to pray, show goodwill, show them the way, and accompany them along it."
The Vatican is officially launching the book Tuesday with a panel discussion featuring Francis' secretary of state, Cardinal Pietro Parolin, and 'Life Is Beautiful' actor Roberto Benigni, signaling the importance Francis places on getting the message out.
Francis has made clear from the start of his pontificate that his would be a papacy focused on mercy, and he called a jubilee year to emphasise it. Throughout the book, Francis refers repeatedly to his own ministry to prostitutes and prisoners in Argentina, showing how his own personal encounters with society's outcasts have shaped his view about the faith and formed the bedrock of his papacy.
As a confessor, Francis is quoted as saying, "I have always tried to find a crack, just a tiny opening so that I can pry open that door and grant forgiveness and mercy."
But Francis' opening isn't a free-for-all: He says of course prisons can't throw their doors open and let violent criminals out onto the streets. But he says once a debt is paid, prisoners must be reintegrated back into society and welcomed. And he distinguishes between ordinary and even repeat sinners and those who are corrupt, saying corruption is a condition, a state of life and often a hypocritical one incompatible with Christianity.
"The corrupt man often doesn't realise his own condition, much as a person with bad breath doesn't know they have it," he says.
Some conservatives have balked at Francis' mercy-over-morals priorities, saying it has sent confusing messages to the faithful especially after two previous popes spent so much time stressing doctrine.
Some cardinals have called on Francis to make clear-cut policy statements on certain issues, especially the divisive question of whether divorced and civilly remarried Catholics can receive Communion.
Church teaching holds that, if these Catholics are living in sin, they cannot receive the sacraments.
Francis launched a two-year study on the issue and other matters related to Catholic family life, and is expected to weigh in this year with a document on whether any accommodation can be found.
In the book, Francis doesn't commit himself one way or the other on the matter, but indicates that his decision may draw on a personal experience.
He recounts that one of his nieces wanted to marry a man who had children from a previous marriage, but hadn't yet obtained an annulment - a church decree that his first marriage was invalid.
The couple got married in a civil ceremony and went on to have three children. Francis recalls that every Sunday when they went to Mass the man went to confession and told the priest that he knew he couldn't be absolved from the sin of adultery, but he asked for a blessing.
"This is a religiously mature man," Francis said.
Progressives, led by the German bishops, have said such religiously mature Catholics should be allowed to participate fully in the life of the church, including receiving the sacraments.