The document discusses holiness as one of the pastoral priorities for the new millennium according to Novo Millennio Ineunte. It defines holiness as the high standard of ordinary Christian living, the perfection of charity, and doing the will of God. The document argues that holiness is for all Christians, not just a few, and can be achieved through everyday actions and avoiding sin. It provides biblical support for the call to holiness and explains that the Catholic Church is holy because it was founded by Jesus Christ and has the means to make people holy through the sacraments and other spiritual practices.