The Three Ages of the Interior Life is one of the greatest works ever written on the spiritual life, and it is the masterpiece of Father Reginald Garrigou-Lagrange, O.P. (1877-1964), whom many consider the greatest theologian of the 20th century. First published in English in 1948, The Three Ages of the Interior Life has been out of print for many years, yet it is widely known and highly esteemed by those fortunate enough to own a set.

Read Volume 1: https://archive.org/details/threeagesofinter0000regi