Living in the grace of God involves a cost. There was a cost felt by the first disciples of Jesus when they left everything to follow Him. As they did this, so each person called to be a disciple must be willing to give up something in the short term in order to receive the Gospel and to live by it.
A willingness to sacrifice doesn't mean that we cannot attempt to improve our lives and the lives of our children. But we do need to be cautioned against letting our lives slip so out of focus that we lose sight of the fact that God-with-us must be the true center of our lives. To improve one's state in life is good, but not at a cost to others. To be centered on material well-being and security, and not on Jesus Christ, is empty. It is so easy to make idols of things. Remember: it’s not our outward appearance, it’s not the position we have in life, it's not the home we live in, or the job we have, that enables our success in God's kingdom. It’s not the possessions we gather about ourselves that give us personal security. Rather, it’s what happens to us on the inside – our on-going conversion to Jesus Christ.
Jesus came to proclaim the good news that He is God with us. He came to us through the Virgin Mary, and He remains with us in the Most Holy Sacrament. But we’ve got to do our part, and this is our part of the covenant we have with God: to allow Him to be the center of our lives.