This is a prime reason why it's important for the children of indifferent parents to be exposed to Christian education. Catholic schools provide a consistent source of Christ's love. Children need to know Jesus as their redeemer, brother, and friend. This is especially important if He's not offered elsewhere. Parents who do not live up the promises made at their child's baptism do not excuse the Church from its evangelical ministry.
Christian education is like an orchestra.
Each instrument works together, to bring life to a beautiful piece of music. Home, school, and Church work together to bring life, more abundant life, eternal life, to our children. One aspect alone can make a contribution, but together the impact on the student and society can be amazing. The Catholic school, like the cross, reaches up from the individual to God, but also reaches out to the entire community. It's true that the cost of running a Catholic school is steadily increasing.