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"Paul illustrates the same idea of a necessary renewal of our way of being human in two passages of his Letter to the Ephesians; let us therefore reflect on them briefly. In the Letter's fourth chapter, the Apostle tells us that with Christ we must attain adulthood, a mature faith. We can no longer be "children, tossed to and fro and carried about with every wind of doctrine..." (4: 14). Paul wants Christians to have a "responsible" and "adult faith". The words "adult faith" in recent decades have formed a widespread slogan. It is often meant in the sense of the attitude of those who no longer listen to the Church and her Pastors but autonomously choose what they want to believe and not to believe hence ado-it-yourself faith. And it is presented as a "courageous" form of self-expression against the Magisterium of the Church. In fact, however, no courage is needed for this because one may always be certain of public applause. Rather, courage is needed to adhere to the Church's faith, even if this contradicts the "logic" of the contemporary world. This is the non-conformism of faith which Paul calls an "adult faith". It is the faith that he desires. On the other hand, he describes chasing the winds and trends of the time as infantile. Thus, being committed to the inviolability of human life from its first instant, thereby radically opposing the principle of violence also precisely in the defence of the most defenceless human creatures is part of an adult faith.
It is part of an adult faith to recognize marriage between a man and a woman for the whole of life as the Creator's ordering, newly re-established by Christ. Adult faith does not let itself be carried about here and there by any trend
. It opposes the winds of fashion. It knows that these winds are not the breath of the Holy Spirit; it knows that the Spirit of God is expressed and manifested in communion with Jesus Christ."
-Pope Benedict XVI