Christians who take their faith seriously — unless called to a monastic lifestyle — are not supposed to withdraw from such a world, but to transform it; their influence, example, and prayers are intended to demonstrate God's love for the world — a love so great that He sent His only Son for its salvation (cf. Jn. 3:16). Fulfilling this mission, however, requires an awareness of the challenges we face — challenges which, while they can only be overcome through divine grace, require us for our part to be as "shrewd as serpents and simple as doves" (Mt. 10:16).
Fr. Joseph M. Esper, “Spiritual Dangers of the 21st century,” 2010, introduction