We cannot always have access to a spiritual Father for counsel in our actions, and particularly in our doubts; but reading will abundantly supply his place by giving us lights and directions to escape the illusions of the devil and of our own self-love, and at the same time to submit to the divine will.

(Saint Alphonsus)

You will not see anyone who is really striving after his advancement who is not given to spiritual reading. And as to him who neglects it, the fact will soon be observed by his progress.

(Saint Athanasius)

Spiritual reading and prayer are the arms by which hell is conquered and paradise won.

(Saint Bernard)