We must aim at heaven with all our strength. Man will have to re-learn, much more positively and intensively than before, that life leads from the personal dialogue with God to the actual personal encounter and the experience of unity with God.
He will have to learn that this is his heaven and his real, his only, home. Then he will learn to pray, not merely as a duty and in obedience, but with intense vitality and with all the driving force of his own free will.
The Prison Meditations of Alfred Delp
Fr. Alfred Delp, SJ