Do Catholics subscribe to the "once saved, always saved" doctrine that many evangelical Christians believe in? Many evangelical Christians say that once a person has accepted Jesus as their Savior and repented of their sins they have formed a bond between their soul and the Lord that is unbreakable. Do Catholics believe that this is true? I have heard that confession of sins to a Priest is common in Catholicism, and wondered how a Catholic would respond to a once saved always saved  Christian.
A baptized Catholic would understand "accepting Jesus" as meaning professing the (Catholic) Faith; he would interpret "repenting of one's sins" as receiving absolution from a priest in the sacrament of penance, and thus being in a state of grace (the state of not having the stain of mortal sin on his soul). If he were to die in a state of grace, he would either go straight to heaven, or, if he still has temporal punishment remaining for his already forgiven sins, he would go to purgatory for awhile and eventually go to heaven. Since one can fall out of the state of grace by committing mortal sin, or by committing numerous venial sins that predispose one to eventually commit a mortal sin, one is not guaranteed to be saved "once and for ever" just because one once "accepted Jesus and repented of one's sins."