The soul of man is the spirit within the man which God gave unto him (1 Cor 2:11). Without the soul, the body dies. The soul of man after he dies returns back to God who gave it (Eccl 12:7). Then it is judged by Christ according to the gospel of Christ (Jn 12:48 f; Rom 2:16). The soul that has obeyed the gospel and remained faithful to the doctrine of Christ and his apostles is saved (Mk 16:16 f; 2 Jn 9). The soul which knows not God and has not obeyed the gospel of Christ is cast into the lake of fire (2 Thess 1:7-9).
I know you many have been taught that salvation is a complicated thing which requires a PhD to interpret, but this is not true. Even the highly uneducated and simple minded can understand the gospel of Christ (Mt 11:25,26). The gospel simply states that Jesus Christ, the Son of God died for your sins, was buried and was raised to life again according to the scriptures (1 Cor 15:1-4). If you believe this and confess such before men; and repent and are baptized for the remission of sins, you are added to the Lord’s church (Rom 10:8-10 ff; Acts 2:38; Acts 2:47). This is the same church which Christ built, died and paid for with his own blood (Mt 16:18 f; Acts 20:28). This church bears His name, for He is the head of the church and the Savior of the body, the church (Eph 1:22,23 ff; Col 1:18; Eph 5:23). Examples of the Church’s name are: The churches of Christ (Rom 16:16); The church of God (2 Cor 1:1); The church of the FirstBorn (Heb 12:23). Each of these are in reference to Jesus Christ. The church is the foundation of the truth and teaches the manifold wisdom of God (1 Tim 3:15 f; Eph 3:10). Therefore, the church which Christ built not only bears His name, but also teaches His doctrine (Jn 7:16,17 ff; Acts 2:42; 2 Jn 9). Remaining faithful unto death means that you worship God in Spirit and in truth (Jn 4:23,24). It means continuing in the apostolic doctrine, aka, the doctrine of Christ (Acts 2:42 f; 2 Jn 9). It means enduring trials and persecutions for the cause of Christ (Jam 1:12 ff; 2 Tim 3:12; 1 Pet 4:16).
Life is very short and could end abruptly at any moment (1 Thess 5:2). So, I ask you, are you gambling with your soul? Why stand in jeopardy every hour (1 Cor 15:30)? Get right and stay right with God (Amo 4:12)! Do it today (2 Cor 6:2), for your soul’s sake!