The position of cardinal is a rank of honour bestowed by popes on certain clergy, such as leaders within the Roman Curia, bishops serving in major cities and distinguished theologians. 253 Similarly, the Catholic Church opposes in vitro fertilisation (IVF saying that the artificial process replaces the love between a husband and wife. 145 The liturgies of the sacraments are central to the church's mission. Archived from the original on Retrieved " CCC, 1263". 199 Remarriage following a divorce is not permitted unless the prior marriage was declared invalid. Latourette, by Kenneth Scott. Retrieved Christian Bible, Luke 23:3943 "Library : The Hope of Salvation for Infants Who Die Without Being Baptized".