The present dissertation develops a reflection about the possibility, or impossibility, for the new believer to accomplish a truly Christian conversion. We designate new believer those who pass through the churches, seeking to unfold religiousness with their own resources. The Christian theology perceives that the post-modern man can find himself in a non-salvation condition due to characteristics of his time, among them we find: individualism, unavailability to share gifts and to deal with communitarian life, significant selfishness etc. The research also shows the need for the communitarian life in the process of the actual Christian conversion. Our thoughts will indicate that this non-salvation condition reaches every human being as a sinner. However it will present that the proposal of salvation by means of God`s Grace through Jesus Christ is also universal and instigates a change of behavior and resigned attitudes towards the Master by those who make themselves attainable to follow Him. This matter achieves its relevance as it stimulates the Christians, responsible for the Gospel`s announcement, to position themselves regarding the religious mobility. The catholic church shall take on the task of revising its theological language and its preaching as well as its pastoral exercise, with the purpose of welcoming the new believer in a expression of authentic conversion to Jesus Christ.