A hardened heart cannot comprehend even the greatest miracles. But "how does a heart harden?" Pope Francis asked this question during the Mass celebrated on Friday 9 January at Santa Marta.

The disciples, we read in the liturgical passage from Mark's Gospel (6:45-52), "had not understood the fact of the loaves: their hearts were hardened". Yet, Francis explained, 'they were the apostles, Jesus' closest ones. But they did not understand'. And although they had witnessed the miracle, although they had "seen that those people - more than five thousand - had eaten with five loaves" they had not understood. "Why? Because their hearts were hardened".

So many times Jesus "speaks of hardness of heart in the Gospel", rebukes the "hard-necked people", weeps over Jerusalem "who did not understand who he is". The Lord confronts this hardness: "So much work has Jesus done," the Pope stressed, "to make this heart more docile, to make it without hardness, to make it loving. A 'work' that continues after the resurrection, with the disciples of Emmaus and so many others.

"But," the Pontiff wondered, "how does a heart harden? How is it possible that these people, who were with Jesus always, every day, who heard him, saw him... and their hearts were hardened. But how can a heart become like that?" And he related: "Yesterday I asked my secretary: Tell me, how does a heart become hardened? He helped me to think about this a little". Hence the indication of a series of circumstances with which everyone can compare their personal experience. 

First of all, Francis said, the heart "is hardened by painful experiences, by hard experiences". This is the situation of those who 'have had a very painful experience and do not want to enter into another adventure'. This is precisely what happened after the resurrection to the disciples of Emmaus, whose remarks the Pontiff imagined: "'There is too much, too much noise, but let's go away a little, because...'" -Why, what? - "Eh, we hoped that this was the Messiah, there was no Messiah, I don't want to delude myself again, I don't want to delude myself!". 

Here is the heart hardened by an "experience of sorrow". The same happens to Thomas: 'No, no, I don't believe it. If I don't put my finger there, I don't believe it!". The disciples' hearts were hardened 'because they had suffered'. And in this regard Francis recalled a popular Argentinean saying: 'If a person is burnt by milk, when he sees the cow he cries'. That is, he explained, 'it is that painful experience that keeps us from opening our hearts'.

Another reason that hardens the heart is then 'closure in oneself: making a world in oneself'. It happens when man is "closed in on himself, in his community or his parish". It is a closure that "can revolve around many things": around "pride, sufficiency, thinking that I am better than others" or even "vanity". The Pope specified: "There are the 'mirror' men and women, who are closed in on themselves to look at themselves, continuously": they could be called 'religious narcissists'. These "have hard hearts, because they are closed, they are not open. And they try to defend themselves with these walls they make around themselves'.

There is a further reason that hardens the heart: insecurity. This is what is experienced by the person who thinks: 'I don't feel secure and I look for somewhere to cling to in order to be safe'. This attitude is typical of people 'who are so attached to the letter of the law'. It happened, the Pontiff explained, "with the Pharisees, with the Sadducees, with the doctors of the law of Jesus' time". They would object: "But the law says this, but it says this up to here...", and so "they would make another commandment"; in the end, "poor things, they would take on 300-400 commandments and feel secure". 

In reality, Francis pointed out, all these 'are safe people, but just as a man or a woman in a prison cell behind the grate is safe: it is a security without freedom'. Whereas it is precisely freedom that 'Jesus came to bring us'. St Paul, for example, reproaches James and also Peter "because they do not accept the freedom that Jesus brought us".

Here then is the answer to the initial question: "How does a heart harden?". For the heart, "when it hardens, it is not free, and if it is not free, it is because it does not love". A concept expressed in the first reading of the day's liturgy (1 John 4:11-18), where the apostle speaks of "perfect love" that "casts out fear". For "in love there is no fear, because fear presupposes punishment, and he who fears is not perfect in love. He is not free. He always has the fear that something painful, sad will happen", that we will "go wrong in life or risk eternal salvation". In reality, these are only 'imaginations', because that heart simply 'does not love'. The disciples' hearts, the Pope explained, "were hardened because they had not yet learned to love".We can then ask: "Who teaches us to love? Who frees us from this hardness?" "Only the Holy Spirit can do it," Francis clarified, pointing out, "You can do a thousand catechesis courses, a thousand spirituality courses, a thousand yoga courses, Zen and all these things. But all this will never be able to give you the freedom of a son". Only the Holy Spirit "moves your heart to say 'father'"; only he "is able to drive out, to break this hardness of heart" and make it "docile to the Lord. Docile to the freedom of love". It is no coincidence that the disciples' hearts remained "hardened until the day of the Ascension", when they said to the Lord: "Now the revolution will take place and the kingdom will come!" In reality "they understood nothing". And "only when the Holy Spirit came did things change".

Therefore, the Pontiff concluded, "let us ask the Lord for the grace to have a docile heart: may he save us from the slavery of a hardened heart" and "bring us forward into that beautiful freedom of perfect love, the freedom of the children of God, that which only the Holy Spirit can give".

[Pope Francis, S. Marta homily, in L'Osservatore Romano 10/01/2015]