The Splendor of Truth by Pope John Paul II reveals that we are called to salvation through faith in Jesus Christ, "the true light that enlightens everyone" (Jn 1:9), people become "light in the Lord" and "children of light" (Eph 5:8), and are made holy by "obedience to the truth" (1 Pet 1:22).
The Splendor of Truth by Pope John Paul II also reveals that this obedience is not always easy. As a result of that mysterious original sin, committed at the prompting of Satan, the one who is "a liar and the father of lies" (Jn 8:44), man is constantly tempted to turn his gaze away from the living and true God in order to direct it towards idols (cf. 1 Thes 1:9), exchanging "the truth about God for a lie" (Rom 1:25). The Splendor of Truth by Pope John Paul II shows us that man's capacity to know the truth is also darkened, and his will to submit to it is weakened. Thus, giving himself over to relativism and skepticism (cf. Jn 18:38), he goes off in search of an illusory freedom apart from truth itself.