Also keep back Your servant from presumptuous sins;
Let them not rule over me;
Then I will be blameless,
And I shall be acquitted of great transgression.
The presumptuous (or proud) sins are many times the worst.
It isn't that we have given in to some great immorality, but we have simply presumed ourselves to be more than we are. If we can realize who we are, then we will be blameless (complete).