"The one who lives in this way, 'according to the flesh,' that is, who subjects himself – even if not altogether consciously, nevertheless effectively – to the threefold concupiscence, particularly to the concupiscence of the flesh, ceases to be capable of this freedom for which 'Christ has set us free'; he also ceases to be [...]
"Concupiscence in general – and the concupiscence of the body in particular – attacks precisely this 'sincere gift': it deprives man, one could say, of the dignity of the gift, which is expressed by his body through femininity and masculinity, and in some sense 'depersonalizes' man, making him an object 'for the other.'” Pope [...]
"So let the person of faith do too. Let him leave childish behavior and grow up to fullness of virtue and persevere in its strength, leaving the pride of desire, which pants after foolish vice; but let him with anxious care meditate what may be useful for him, though before he stooped childishly to childish [...]
"The spousal meaning of the body has not become totally foreign to that heart: it has not been totally suffocated in it by concupiscence, but only habitually threatened. The 'heart' has become a battlefield between love and concupiscence. The more concupiscence dominates the heart, the less the heart experiences the gift of the person that [...]
"Unless a man sets out to help his neighbor in the spirit of love he will never overcome those faulty tendencies in his nature which constantly try to drag it down." Source: Ven. Fulton J. Sheen, Way to Happiness, St. Pauls, 1998.