Catholics believe that grown-up Faith demands the courage "to stand against the winds of fashion".

In the last few decades, the expression ‘adult faith’ [fede adulta, 'grown up faith'] has become a widespread slogan. It is often used in relation to the attitudes of those who no longer pay attention to what the Church and her Pastors say — which is to say, those who choose on their own what to believe or not to believe in a sort of ‘do-it-yourself’ faith. Expressing oneself against the Magisterium of the Church is presented as a sort of ‘courage’, whereas in fact not much courage is needed because one can be certain of receiving public praise.

Instead, courage is needed to adhere to the Church’s faith, even if it contradicts the 'order' of today’s world. Paul calls this non-conformism an ‘adult faith’. For him, following the prevailing winds and currents of the time is childish.

For this reason, it is part of an adult faith to dedicate oneself to the inviolability of life from its beginning, thus radically opposing the principle of violence, in defense precisely of the most defenseless. It is part of an adult faith to recognize the lifelong marriage between one man and one woman in accordance with the Creator’s order, re-established again by Christ. An adult faith does not follow any current here and there. It stands against the winds of fashion.

Benedict XVI
Homily - First Vespers of the Feast of Saints Peter and Paul
June 28, 2009