2019 Reprint of 1945 Edition. Full facsimile of the original edition, not reproduced with Optical Recognition software. This work is a classic within the Catholic tradition regarding the important of the interior life. Interior life is a life which seeks God in everything, a life of prayer and the practice of living in the presence of God. It connotes intimate, friendly conversation with Him, and a determined focus on internal prayer versus external actions, while these latter are transformed into means of prayer. According to John Paul II, Jesus' statement "without me you can do nothing" (cf. Jn 15:5) is a truth that "constantly reminds us of the primacy of Christ and, in union with him, the primacy of the interior life and of holiness."