The leader of the Catholic Church in Scotland, Cardinal Keith O’Brien, will use his Easter message later to attack “aggressive secularism”.
It was something Pope Benedict warned about on his state visit to Britain last year.
Cardinal O’Brien will say the enemies of Christianity want to “take God from the public sphere”.
The cardinal has made a reputation for his robust defence of traditionalist Christian teaching.
But BBC religious affairs correspondent Robert Pigott says even by Cardinal O’Brien’s standards his Easter sermon constitutes a vehement and outspoken attack on secularism and what he will describe as the enemies of the Christian faith in Britain and the power they currently exert.