Everyone has sinned. Some people believe these sins have consequences. The Catholic Church believed you have to have justification in order to enter heaven.
Justification is what catholics believed to be a soul pleasing to God. The soul, darkened by sin, is actually cleansed by God’s grace. The act of a sacrament is what causes justification. Some people describe a sacrament as a “sensible sign of invisible grace”. The grace is conveyed by the sacraments.
There are seven known sacraments to the Catholic Church to this day; Baptism, Eucharist, Confirmation, Reconciliation, Anointing of the sick, Marriage, and Holy orders. Most of these are lifetime things, you must be consistent in order to remove you from your sins.
In conclusion, if you have sins, which you most likely do, catholic’s theology of justification can clear your darkened soul and make you “eligible” to enter heaven.
Picture Credit: Catholic New Malden