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A priest reads a new book about Pope Benedict XVI under the coloumnade in St Peters Square at the Vatican on Tuesday. Pope Benedict says in his new book that he would not hesitate to become the first pontiff to resign willingly in more than 700 years. Image Credit: Reuters

Vatican City: As Pope Benedict XVI's controversial new book is snapped up in bookshops, Vatican experts say he has cast off his reputation as a conservative "rottweiler" in favour of a more compassionate image.

From condom use to child abuse, the veil and female ordination, Benedict talks candidly in Light of the World" about the polemical issues that have marked his pontificate since April 2005.

The book is "the fruit of repeated crises" in the Church's relationship "with Jews, Muslims and also with public opinion on delicate issues such as paedophile priests and condoms," Vatican expert Marco Politi said. With this collection of interviews, the 83-year-old pope hopes to open a "new channel of communication with the world," Politi added.

Benedict caused a global outcry on a trip to Cameroon last year when he said condoms would "aggravate" Aids; in an apparent about-turn, he now says they can be used "in some case" to prevent the spread of disease.

"It's a considerable step forward," said Politi. "It's the first time that a pope accepts condom use this clearly, even if a number of bishops and cardinals had already said so."

Sandro Magister, who covers the Vatican for the Italian news weekly l'Espresso, said: "the book completely demolishes the image of retrograde, ultraconservative Ratzinger."

"He shows a desire to understand the world. The only example he gives for condom use shows his goodness, even towards sinners," he added.

The German pope also makes tentative inroads into delicate issues such as banning divorced people from receiving communion. But analysts said the pope fails to address important topics that drive modern society.

The Church still views sexuality as a means to an end and contraception is taboo. Homosexuality is denounced as immoral while female ordination is simply out of the question. However, far from living up to derogatory nicknames conjured up for him by critics such as "Panzer Cardinal" or "Grand Inquisitor," Joseph Ratzinger admits he doesn't know all the answers, and is sometimes even afraid.

Benedict says he is aware of his weaknesses, even tackling the subject of a resignation "should a pope realise he is no longer physically, psychologically and spiritually capable."

"These are questions that had already been addressed by Paul VI and John Paul II, but always in a very muted way," said Politi.