Never underestimate the power, the seduction, or the evil of the World, and you will do well.
The devil and the flesh are old adversaries; if you've read any spiritual books you know the scoop on those.
But the world is all around us constantly. Even if 300 fervent young Catholics went to start a "Traditional Catholic community" with a militant spirit, they would STILL be bringing a little of the world in with them -- because the World is in each one of us, to a greater or lesser degree. In this man, he might have absorbed 10%. The next guy, 30%. The one next to him, 65%.
There is an infinite variety of ideas, ways of thinking, assumptions, frames of reference, etc. that encompass the broad term, The Modern World.