What is the 'salvation' which you are referring?

I believe salvation is in three phases, # 1. We are saved from the penalty of sin soely by the person and work of the lord jesus Christ for His Sheep, His obedience unto death, #2 there's salvation from the power of sin, that is when the Holy Spirit gives Spiritual life to the Sheep Christ died for, giving them faith and repentance, #3 Salvation in the future from the presence of sin, Glorification with a new redeemed body. I believe 2 Thess 2 13 is about # 2 The sanctification of the Spirit is the New Birth, it's called a saving work Titus 3:5

not by works of righteousness which we have done, but according to his mercy he saved us, by the washing of regeneration, and renewing of the Holy Ghost;