How does Salvation work?

Who may ascend into the hill of the Lord?
Or who may stand in His holy place?
He who has clean hands and a pure heart,
Who has not lifted up his soul to an idol,
Nor sworn deceitfully.
He shall receive blessing from the Lord,
And righteousness from the God of his salvation.
This is Jacob, the generation of those who seek Him,
Who seek Your face. Selah
Psalm 24.3-6