The doctrine and study of salvation is often classified by the term Soteriology. In general Christian Soteriology may add that this is a study of salvation through the work of Christ and the Holy Spirit. This does not give particulars of what work Christ performed, the role of the Holy Spirit and how they result in an individuals salvation.
A more detailed explanation of the Christian doctrine of salvation deals with the work of the triune God in bringing creation, and especially humans, to enjoy the divine purpose for existence. More specifically, “objective” soteriology speaks of the life, death, resurrection and exaltation of Christ in relation to human salvation. In addition, “subjective” soteriology (the work of the Spirit in the application of Christ’s salvation) deals with the process whereby individuals are brought to God’s saving goals. Topics generally covered include election, calling, regeneration, faith, repentance, conversion, justification, sanctification and glorification
A Few Thoughts of my Own . . .
As a result of man’s sin, he became dead, separated from God, in trespasses and sins. Incurring divine judgment of eternal condemnation. Because of this sinful condition and position, Man can never earn salvation by self-improvement, good works or by being a "good person" but is in need of a savior. Man only recognizes this need through the gracious work of God upon the heart, revealing the problem of sin, and the solution of salvation by grace through faith/belief in the work of the triune God, finished in Jesus Christ. Salvation is a gift from the triune God to man.
This process of acknowledging his sinfulness, repenting of those sins, and trusting in Jesus Christ as savior is Man’s response to this revelation initiated by God. Thus being born again, with the continued work of the Holy Spirit creating in him a new nature from God, the man therefore becoming a new creature in Christ. Thus changing his position from spiritual death to spiritual life, from the Kingdom of Darkness, to the Kingdom of Light and becoming a joint heir with Christ as sons of God. Justifying him before the judgment seat of God, by the shed blood of the perfect sacrifice, Jesus Christ, removing the guilt of sin.
Secure by faith in his new position, His condition is a work in progress, known as sanctification, and should for life, be growing and maturing towards the high calling of his position. In other words, Eternal life begins the moment one receives Jesus Christ as savior into his life by faith. We are saved by grace through faith; therefore no one can make the claim that it was their own actions that saved them. For God so loved the world, that whoever believes in Him, will not perish but have everlasting life! Making a way for His creation to be redeemed, and reconciled to Him, and His beautiful purpose for their existence reaching its pinnacle in glorification of the believer.
 Romans 5:1, Romans 6:23, Ephesians 2:8-9, John 3:16,14:6 & 1:12, Titus 3:5, Galatians 3:22-26
Pocket Dictionary of Theological Terms, s.v. “S,” 108.