Before praying the Angelus at the traditional 12 o'-clock noon, the Holy Father always gives a sermon on the Gospel of that Sunday.
From Vatican News: http://www.news.va/en/news/pope-francis-pray-always-without-growing-weary
Dear brothers and sisters, good day!
In today’s Gospel, Jesus told a parable about the necessity for them to pray always without becoming weary. The main character is a widow who, forced to plead before a dishonest judge, manages to get him to grant her justice. And Jesus concludes, if the widow managed to convince that judge, do you think God will not hear us, if we pray to Him insistently? The expression used by Jesus is very strong: “Will not God then do justice for His chosen ones who call out to Him day and night?”
“To cry out day and night” to the Lord! This is a striking image of prayer. But we might ask, why does God want this. Doesn’t He already know our needs? What does it mean to “insist” with God?
And this is a good question, that leads us to deepen a very important aspect of the Faith: God invites us to pray with insistence, not because He doesn’t know what we need, or because He doesn’t listen to us. On the contrary, He always hears and knows all of us, with love. In our daily journey, especially in difficulties, in the fight against evil outside of ourselves and within us, the Lord is not far away, He is at our side; we fight with Him beside us, and our weapon is prayer, which makes us feel His presence alongside of us, His mercy, even His help. But the fight against evil is hard and long, it requires patience and resistance – like Moses, who had to hold up his arms so that his people could triumph (cf. Ex. 17:8-13). It is so: there is a struggle to carry on every day; but God is our ally, faith in Him is our strength, and prayer is the expression of this faith. Therefore, Jesus assures us of victory but in the end He asks “When the Son of Man comes, will He find faith on earth?” (Lk. 18:8). If the faith goes out, if prayer goes out, and we walk in the darkness, we will be lost on the journey of life.
Let us learn, therefore, from the widow of the Gospel, and pray always without growing weary. This widow was good, she knew to fight for her children, and I think of the many women who fight for their families, who pray, who never grow weary! Today let us remember, all of us, these women who with their behaviour give us a true witness of faith, of courage, of a model of prayer. Let us remember them! Pray always, but not to convince the Lord by the strength of words! He knows better than we do what it is we need. And so persevering prayer is an expression of faith in a God Who calls us to fight along with Him, every day, every moment, to overcome evil with good.