"Latin is the key to the vocabulary and structure of the Romance languages and to the structure of all the Teutonic languages, as well as to the technical vocabulary of all the sciences and to the literature of the entire Mediterranean civilization, together with all its historical documents."—Dorothy Sayers

Latin Dictionary and Grammar Aid

Lewis and Short Latin Dictionary [BUY THE LATIN DICTIONARY]

[Novum Testamentum] [Liber Psalmorum] [Vetus Testamentum]

Keep up your Latin by reading a verse a day from the Latin Vulgate.
Follow this ordered reading plan (cf. Latin Grammar, chapters XII–XX):

Mt 2: 1-23
Mt 5: 1-24
Mt 8: 1-34
Mk 2: 1-28
Mk 8: 1-39
Lk 4: 1-37
Lk 11: 1-26
Jn 18: 1-40
Jn 20: 1-31

Test your ability every day to sight read Latin by translating the following random Bible verse on the spot:

BE ALL YOU CAN BE!

Latin and Greek in Catholic Education

Congregation for Catholic Education, "Decree on the Reform of Ecclesiastical Studies of Philosophy" (Jan 28, 2011).

Congregation for Catholic Education, "Inspectis dierum nostrorum" (1989), Acta Apostolicae Sedis 81 (1990): 607–636. [PDF]

Pope Paul VI, "Sacrificium laudis", Apostolic Letter (Aug 15, 1966).

Congregation for Seminaries, "Sacrum Latinae linguae depositum" (1962), Acta Apostolicae Sedis 54 (1962): 336–. [PDF]

Pope John XXIII, "Veterum Sapientia", Apostolic Constitution (Feb 22, 1962).

Pope Pius XI, "Officiorum omnium", Apostolic Letter (Aug 1, 1922).