The Imitation of Christ
This book speaks to the soul of every true Christian, reminding us of the fleeting nature of earthly joy as opposed to the eternity of happiness with God.
The guide of the saints since it first appeared in 1418, it was the sole spiritual reading of St. Therese of Lisieux, who loved it and knew it by heart.
Fr. Garrigou-Lagrange asserted that the true mysticism of which it speaks is accessible to all, if they are willing to follow the way of humility, the cross, continual prayer, and docility to the Holy Ghost.