The Catechism of the Catholic Church references Tobit in several places:
The Almighty: “He does whatever he pleases”:
269. The Holy Scriptures repeatedly confess the universal power of God. He is called the “Mighty One of Jacob,” the “LORD of hosts,” the “strong and mighty” one. If God is almighty “in heaven and on earth,” it is because he made them. Nothing is impossible with God, who disposes his works according to his will. He is the Lord of the universe, whose order he established and which remains wholly subject to him and at his disposal. He is master of history, governing hearts and events in keeping with his will: “It is always in your power to show great strength,and who can withstand the strength of your arm?” [Cf. Tobit 13:2]
Divine Providence: Providence and the scandal of evil.
312. In time we can discover that God in his almighty providence can bring a good from the consequences of an evil, even a moral evil, caused by his creatures: “It was not you,” said Joseph to his brothers, “who sent me here, but God . . . . You meant evil against me; but God meant it for good, to bring it about that many people should be kept alive.” [Cf. Tobit 2:12-18 (Vulgate)] From the greatest moral evil ever committed – the rejection and murder of God’s only Son, caused by the sins of all men – God, by his grace that “abounded all the more,” brought the greatest of goods: the glorification of Christ and our redemption. But for all that, evil never becomes a good.
The Angels: The angels in the life of the Church:
336. From its beginning until death, human life is surrounded by their watchful care and intercession. [Cf. Tobit 12:12] “Besides each believer stands and angel as protector and shepherd leading him to life.” Already here on earth the Christian life shares by faith inthe blessed company of angels and men united in God.
Man: “In the Image of God”:
360. Because of its common origin the human race forms a unity, for “from one ancestor (God) made all nations to inhabit the whole earth”: [Cf. Tobit 8:6]…[Pope Pius XII’s encyclical, *Summi Pontificatus 3 is then quoted in the text.]
Interior Penance: The Many Forms of Penance in Christian Life:
1434. The interior penance of the Christian can be expressed in many and various ways. Scripture and the Fathers insist above all on three forms, fasting, prayer, and almsgiving, [Cf. Tobit 12:8] which express conversion in relation to oneself, to God, and to others. Alongside the radical purification brought about by Baptism or martyrdom they cite as means of obtaining forgiveness of sins: efforts at reconciliation with one’s neighbor, tears of repentance, concern for the salvation of one’s neighbor, the intercession of the saints, and the practice of charity “which covers a multitude of sins.”
Moral Conscience: To Choose in Accord with Conscience:
1789. Some rules apply in every case:
–One may never do evil so that good may result from it;
–the Golden Rule: “Whatever you wish that men would do to you, do so to them.” [Tobit 4:15]
–charity always proceeds by way of respecct for one’s neighbor and his conscience: “Thus sinning against your brethren and wounding their conscience…you sin against Christ.” Therefore “it is right not to…do anything that makes your brother stumble.”
The Duties of Family Members: The duties of children.
2214. The divine fatherhood is the source of human fatherhood; this is the foundation of the honor owed to parents. The respect of children, whether minors or adults, for their father and mother [Cf. Tobit 4:3-4] is nourished by the natural affection born of the bond uniting them. It is required by God’s commandment.
Respect for the Dignity of Persons: Respect for the dead.
2300. The bodies of the dead must be treated with respect and charity, in faith and hope of the Resurrection. The burial of the dead is a corporal work of mercy; [Cf. Tobit 1:16-18] it honors the children of God, who are temples of the Holy Spirit.
The Love of Husband and Wife:
2361. “Sexuality, by means of which man and woman give themselves to one another through the acts which are proper and exclusive to spouses, is not something simply biological, but concerns the innermost being of the human person as such. It is realized in a truly human way only if it is an integral part of the love by which a man and woman commit themselves totally to one another until death.”… [Tobit 8:4-9 is then quoted in the text.]
Love for the Poor.
2447. The works of mercy are charitable actions by which we come to the aid of our neighbor in his spiritual and bodily necessities. Instructing, advising, consoling, comforting are spiritual works of mercy, as are forgiving and bearing wrongs patiently. The corporal works of mercy consist especially in feeding the hungry, sheltering the homeless, clothing the naked, visiting the sick and imprisoned, and burying the dead. Among all these, giving alms to the poor is one of the chief witnesses to faternal charity: it is also a work of justice pleasing to God: [Cf. Tobit 4:5-11] … [Luke 3:11, Luke 11:41, and James 2:15-16 are then quoted in the text.]
The Universal Call to Prayer: The Psalms, the prayer of the assembly
2585. From the time of David to the coming of the Messiah texts appearing in these sacred books show a deepening in prayer for oneself and in prayer for others. [Tobit 3:11-16] Thus the psalms were gradually collected into the five books of the Psalter (or “Praises”), the masterwork of prayer in the Old Testament.