180 Father Henri Huvelin, the spiritual director of Saint Charles de Foucauld, observed that, “when our Lord dwells in a heart, he gives it such sentiments, and this heart reaches out to the least of our brothers and sisters. Such was the heart of Saint Vincent de Paul… When our Lord lives in the soul of a priest, he makes him reach out to the poor”. It is important to realize that the apostolic zeal of Saint Vincent, as Father Huvelin describes it, was also nurtured by devotion to the heart of Christ. Saint Vincent urged his confreres to “find in the heart of our Lord a word of consolation for the poor sick person”. If that word is to be convincing, our own heart must first have been changed by the love and tenderness of the heart of Christ. Saint Vincent often reiterated this conviction in his homilies and counsels, and it became a notable feature of the Constitutions of his Congregation: “We should make a great effort to learn the following lesson, also taught by Christ: ‘Learn from me, for I am gentle and humble of heart’. We should remember that he himself said that by gentleness we inherit the earth. If we act on this, we will win people over so that they will turn to the Lord. That will not happen if we treat people harshly or sharply”.
Source: Dilexit Nos (Vatican.va)