It is a good rule, after reading a new book, never to allow yourself another new one till you have read an old one in between. If that is too much for you, you should at least read one old one to every three new ones.
Remembering Lewis’ call to read old books, here are 7 free or $.99 Christian Classics everyone should read.
Dark Night of the Soul by St. John of the Cross
The Interior Castle by St. Teresa of Avila
Revelations of Divine Love by Julian of Norwich