This great quote is from John Paul II, give in 1988 in an apostolic exhortation that was specifically directed towards lay people (that is, not ordained)
There cannot be two parallel lives in our existence: on the one hand, the so-called ‘spiritual’ life with its values and demands; and on the other, the so-called ‘secular’ life, that is, life in a family, at work, in social relationshis, in the responsibilities of public life and in culture … This split between the faith which many of us profess and our daily lives deserves to be counted among the more serious errors of our age.
– The late John Paul II, in Christifideles Laici (The Lay Members of Christ’s Faithful People)
Whether that is seen as hypocrisy, denial, self-delusion, whatever … all we need to do is examine our own lives and we’ll know that this is a trap that is oh-so-easy to fall into. Chameleon-like – holy and all that when it’s convenient, fitting in (with plenty of compromises) when that’s convenient … just don’t let any of our “holy” friends see us now.
This Lent, may God grant us the grace to live a real unity of life, striving for holiness. humility and all the virtues in absolutely every aspect of our lives. Without compromise.