Drawing on his own experience as a priest and shepherd, the Pope discusses mercy, a subject of central importance in his religious teaching and testimony, and in addition sums up other ideas - reconciliation, the closeness of God - that comprise the heart of his papacy.
'The Name of God is Mercy' is written in conversation with Vatican expert and journalist Andrea Tornielli and is directed at everyone, inside or outside of the Catholic Church, seeking meaning in life, a road to peace and reconciliation, or the healing of physical or spiritual wounds.
According to the Pope, humanity is deeply wounded and is need of mercy.
"Either it (humanity) does not know how to cure its wounds or it believes that it's not possible to cure them. And it's not a question of social ills or people wounded by poverty, social exclusion, or one of the many slaveries of the third millennium," he says.
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"Mercy exists, but if you don't want to receive it... If you don't recognise yourself as a sinner, it means you don't want to receive it, it means that you don't feel the need for it."
The Pope reiterates that the Church cannot close the door on anyone - that, on the contrary, its duty is to find its way into the consciousness of people so that they can assume responsibility for, and move away from, the bad things they have done.
attributes to the creator are "merciful and kind".
"This invocation is often on the lips of faithful Muslims who feel themselves accompanied and sustained by mercy in their daily weakness. They too believe that no one can place a limit on divine mercy because its doors are always open," he says.
On corruption, Francis says, "The corrupt man often doesn't realize his own condition, much as a person with bad breath does not know they have it."
Asked about gay Catholics, he tells Tornielli, "I am glad that we are talking about 'homosexual people' because before all else comes the individual person, in his wholeness and dignity. And people should not be defined only by their sexual tendencies: let us not forget that God loves all his creatures and we are destined to receive his infinite love.
According to him, migrants and other vulnerable people should be reached out to, listened, advised, and taught "our own experience".
"By welcoming a marginalised person whose body is wounded and by welcoming the sinner whose soul is wounded, we put our credibility as Christians on the line," he adds.