The Gospel parable which we have just heard (cf. Lk 18:1-8) contains an important teaching: we “ought always to pray and not lose heart” (v. 1). This means, then, pray constantly, not just when I feel like it. No, Jesus says that we ought “always to pray and not lose heart”. And he offers the example of the widow and the judge.
The parable ends with a question: “when the Son of man comes, will he find faith on earth?” (v. 8). And with this question we are all warned: we must not cease to pray, even if left unanswered. It is prayer that conserves the faith, with out it faith falters! Let us ask the Lord for a faith that is incessant prayer, persevering, like that of the widow in the parable, a faith that nourishes our desire for his coming. And in prayer let us experience that compassion of God, who like a Father comes to encounter his children, full of merciful love. (General Audience, Wednesday, 25 May 2016 ).