Hello.
So, how one is saved? And what is salvation exactly? No clear answer in the Bible, and different versions of Christianity or even different teachers within one kind of Christianity may present it quite differently.
Salvation is: Justification + Sanctification = Glorification
God’s plan for our salvation has three parts in this order: Justification, Sanctification, and Glorification.
Justification:
Each one of us have broken God’s Law. This is sin. The wages of sin is (eternal) death (cease to exist forever). This price is more than we can ever repay–it is impossible. Because of God the father’s unconditional love for the us, he gave his only begotten Son Jesus to pay for our debt of eternal death on the cross. This one time event was done by Jesus. Only Jesus is worthy to pay the price for each one of us because he never sinned. He has not broken God’s Law. Jesus (in the form of a man) died a physical death, giving His life willingly and was raised back to life; thus conquering eternal death.
sanctification
It’s the reciprocation of our love toward God. We are sanctified with the help of the Holy Spirit (Comforter) that Jesus gives us. Sanctification means to set a part or to make holy. His Holy Spirit helps us in this process to become more like Christ. This is not a one time event; it’s a life long process (we stumble here and there). The process of sanctifying and purifying us (the works that Jesus does in the believer, and is not of ourselves) ... it is HIM working in us and through us. We are separated from the world. We are in the physical world but not of the world spiritually. Our mind (thinking) changes over time and therefore our actions also change. Our faith increases more and more as He faithfully works in us. Hebrews 12:2
The third stage in the plan of salvation is our glorification.
We won’t be glorified until after Jesus returns. John writes of this in his first letter when he states that “when he shall appear we shall be like him (1 John 3:2). Paul refers to this stage frequently. For example: “For this corruptible must put on incorruption and this mortal must put on immortality (1 Corinthians 15:53). He also refers to a time when “we shall all be changed in a moment in in a twinkling of an eye at the last trump” (1 Corinthians 15:51-52). Paul speaks further of the doctrine of glorification when he says in Romans 8:18, “For the sufferings of this present time are not worthy to be compared with the glory which shall be revealed in us.” We receive glorified spiritual bodies. Receiving eternal life and being with Him forevermore. Those saved (justification + sanctification) will be glorified when Christ returns at the first resurrection.
And because of His grace (favor) if we remain in Him He will accomplish His work
Philippians 1:6
New Living Translation
And I am certain that God, who began the good work within you, will continue his work until it is finally finished on the day when Christ Jesus returns.