When a Roman officer sought healing for his servant, Christ Jesus did not delve into national characteristics and origins; he simply replied, "I will come and heal him.
Neither the four walls of a classroom nor any other place is outside God's kingdom, because teaching in its most enlightened sense is a function of the Christ, whose messages are irresistible.
The world presents captivity in many forms: political hostage-taking, captivity imposed by totalitarian regimes, economic captivity of the poor, captivity of ignorance and fear, and many other examples.