just as David also describes the blessedness of the man to whom God imputes righteousness apart from works:
The dictionary defines the word impute as: ascribe (righteousness, guilt, etc.) to someone by virtue of a similar quality in another. “Christ's righteousness has been imputed to us"
Because of Jesus’ finished work, God does not impute sin to us. What He does impute to us is righteousness apart from works.
Blessings are on the head of the righteous, But violence covers the mouth of the wicked.
And because you are righteous, get ready for His blessings!