29 Considering all these things, and whatever else the Lord shall have made known to you in this matter, which either does not occur to me or would take too much time to state here, strive in prayer to overcome this world: pray in hope, pray in faith, pray in love, pray earnestly and patiently, pray as a widow belonging to Christ. For although prayer is, as He has taught, the duty of all His members, i.e. of all who believe in Him and are united to His body, a more assiduous attention to prayer is found to be specially enjoined in Scripture upon those who are widows. Two women of the name of Anna are honourably named there—the one, Elkanah's wife, who was the mother of holy Samuel; the other, the widow who recognised the Most Holy One when He was yet a babe. The former, though married, prayed with sorrow of mind and brokenness of heart because she had no sons; and she obtained Samuel, and dedicated him to the Lord, because she vowed to do so when she prayed for him. It is not easy, however, to find to what petition of the Lord's Prayer her petition could be referred, unless it be to the last, “Deliver us from evil,” because it was esteemed to be an evil to be married and not to have offspring as the fruit of marriage. Observe, however, what is written concerning the other Anna, the widow: she “departed not from the temple, but served God with fastings and prayers night and day.” In like manner, the apostle said in words already quoted, “She that is a widow indeed, and desolate, trusts in God and continues in supplications and prayers night and day;” and the Lord, when exhorting men to pray always and not to faint, made mention of a widow, who, by persevering importunity, persuaded a judge to attend to her cause, though he was an unjust and wicked man, and one who neither feared God nor regarded man. How incumbent it is on widows to go beyond others in devoting time to prayer may be plainly enough seen from the fact that from among them are taken the examples set forth as an exhortation to all to earnestness in prayer.
30. Now what makes this work specially suitable to widows but their bereaved and desolate condition? Whosoever, then, understands that he is in this world bereaved and desolate as long as he is a pilgrim absent from his Lord, is careful to commit his widowhood, so to speak, to his God as his shield in continual and most fervent prayer. Pray, therefore, as a widow of Christ, not yet seeing Him whose help you implore. And though you are very wealthy, pray as a poor person, for you have not yet the true riches of the world to come, in which you have no loss to fear. Though you have sons and grandchildren, and a large household, still pray, as I said already, as one who is desolate, for we have no certainty in regard to all temporal blessings that they shall abide for our consolation even to the end of this present life. If you seek and relish the things that are above, you desire things everlasting and sure; and as long as you do not yet possess them, you ought to regard yourself as desolate, even though all your family are spared to you, and live as you desire. And if you thus act, assuredly your example will be followed by your most devout daughter-in-law, and the other holy widows and virgins that are settled in peace under your care; for the more pious the manner in which you order your house, the more are you bound to persevere fervently in prayer, not engaging yourselves with the affairs of this world further than is demanded in the interests of religion.
31. By all means remember to pray earnestly for me. I would not have you yield such deference to the office fraught with perils which I bear, as to refrain from giving the assistance which I know myself to need. Prayer was made by the household of Christ for Peter and for Paul. I rejoice that you are in His household; and I need, incomparably more than Peter and Paul did, the help of the prayers of the brethren. Emulate each other in prayer with a holy rivalry, with one heart, for you wrestle not against each other, but against the devil, who is the common enemy of all the saints. “By fasting, by vigils, and all mortification of the body, prayer is greatly helped.” Let each one do what she can; what one cannot herself do, she does by another who can do it, if she loves in another that which personal inability alone hinders her from doing; wherefore let her who can do less not keep back the one who can do more, and let her who can do more not urge unduly her who can do less. For your conscience is responsible to God; to each other owe nothing but mutual love. May the Lord, who is able to do above what we ask or think, give ear to your prayers.
Source: Letters (New Advent)