Base your life 'on the rock of God' and on the 'concreteness' of action and self-giving, rather than 'on appearances or vanity' or on the corrupt culture of 'recommendations'. This is the advice that Pope Francis suggested — during Mass celebrated at Santa Marta on Thursday 6 December — in order to live the Advent season consistently.

These are simple yet demanding guidelines that the Pontiff drew from the readings of the day, in which three significant groups of contrasting words are found: 'saying and doing', 'sand and rock', 'high and low'.

Regarding the first group — 'saying and doing' — the Pontiff immediately recalled the words of the Gospel of Matthew (7:21): "Not everyone who says to me, 'Lord, Lord,' will enter the kingdom of heaven, but only the one who does the will of my Father." And he explained: "One enters the kingdom of heaven, matures spiritually, and advances in the Christian life by doing, not by saying." In fact, "saying is a way of believing, but sometimes very superficial, halfway there": as when "I say I am a Christian but I do not do the things of a Christian." It is a kind of "pretence," because "just saying is a trick," it is "saying without doing."

Instead, "Jesus' proposal is concreteness." And so, "when someone approached him and asked for advice," he always proposed "concrete things." After all, the Pope added, "works of mercy are concrete." And again: "Jesus did not say, 'Go home and think about the poor, think about prisoners, think about the sick': no. Go: visit them."

This is the contrast between doing and saying. It is necessary to highlight this because "so often we slip, not only personally but socially, into the culture of saying". In this regard, Francis pointed to a practice that is unfortunately widespread, that linked to the "culture of recommendations". It happens, for example, that for a university competition, "someone who has almost no merits" is chosen over many talented professors; "and if you ask, 'But why this one? What about the others who are talented...?' - 'Because this one was recommended by a cardinal, you know... the big fish...'". The Pope commented: 'I don't want to think badly, but under the table of a recommendation there is always an envelope'. This is just one example of the prevalence of 'saying': 'it's not merit, it's not doing what gets you ahead, no: it's saying. Faking your life." And this is precisely "one of the contradictions that today's liturgy teaches us: do, don't say." In fact, the Pope explained, concluding this first part of his reflection, "Jesus advises" us to "do without saying: when you give alms, when you pray... in secret, without saying so. Do, don't say."

The second comparison refers to an image used by Jesus in the Gospel: 'a wise man builds his house on rock, not on sand'. The parable has its own evidence: 'Sand is not solid. A storm, winds, rivers, many things, rain cause a house built on sand to fall. Sand is a weak foundation." The Pontiff explained: "Sand is the consequence of saying: I put on a facade, as a Christian, I build a life for myself but without foundations. Vanity, vanity is saying many things, or showing myself without foundation, on sand." Instead, we must 'build on rock'. In this regard, the Pope invited us to grasp the beauty of the first reading of the day, taken from Isaiah (26:1-6), where we read: 'Trust in the Lord forever, for the Lord is an eternal rock'.

This is a contrast closely linked to that between saying and doing, because "so often, those who trust in the Lord do not appear, are not successful, are hidden... but they are steadfast. They do not place their hope in words, in vanity, in pride, in the ephemeral powers of life," but entrust themselves to the Lord, "the rock." Francis explained: "The concreteness of Christian life makes us move forward and build on that rock that is God, that is Jesus; on the solidity of divinity. Not on appearances or vanity, pride, recommendations... No. The truth."

Finally, the "third group," where the concepts of "high and low" are confronted. Once again, the passage from Isaiah guides our meditation: "Trust in the Lord forever, for the Lord is an eternal rock, for he has brought down those who dwelt on high, he has overturned the lofty city, he has overturned it to the ground, he has levelled it to the ground. Feet trample it down: the feet of the oppressed, the steps of the poor." It is a passage, the Pontiff pointed out, that recalls the "song of Our Lady, the Magnificat: the Lord lifts up the humble, those who are in the reality of everyday life, and brings down the proud, those who have built their lives on vanity, pride... these do not last." And the expression, Francis emphasised, "is very strong, even in the Magnificat the word 'overthrown' is used, and even stronger: that great beautiful city is trampled underfoot. By whom? By the feet of the oppressed and the steps of the poor." That is, the Lord "exalts the poor, exalts the humble."

The category of 'high and low', the Pope added in his commentary, is also used by Jesus, for example, when he 'speaks of Satan: "I saw Satan fall from heaven." And it is the expression of a 'definitive judgement on the proud, on the vain, on those who boast of being something but are pure air'.

Concluding his homily, Francis invited us to accompany the season of Advent with reflection on "these three groups of words that contrast with each other. Say or do? Am I a Christian of saying or doing? Sand and rock: do I build my life on the rock of God or on the sand of worldliness, of vanity? High and low: am I humble, do I always try to start from the bottom, without pride, and thus serve the Lord?" It will be helpful to answer these questions; and, he added, also to take up the Gospel of Luke and pray "with the song of Our Lady, with the Magnificat, which is a summary of today's message."

[Pope Francis, St. Martha's House, in L'Osservatore Romano, 6 December 2018]