A person defending his own integrity will sometimes make a profound declaration of absolute innocence, claiming to be completely free of any wrongdoing. To strengthen this claim, a double phrasing is used, first emphasizing a state of absolute clarity and purity from any stain of crime [מצודת ציון, רלב״ג].
The primary approach among commentators is that the second half of this declaration describes a state of thorough, deep cleanliness. This concept is rooted in the physical action of scraping, rubbing, or scrubbing away dirt, similar to washing one's hair or scrubbing dishes. In this view, the two halves of the statement parallel each other to emphasize a spotless existence completely washed clean of sin [רש״י, רלב״ג, מצודת ציון, מצודת דוד, אבן עזרא]. However, another perspective suggests that this second concept is not about scrubbing away dirt, but rather about being covered. According to this view, the individual is shielded and protected from sin entirely, or perhaps wrapped in a protective layer of righteousness [רמב״ן, אבן עזרא].
Building upon this idea of being covered, a deeper philosophical layer emerges based on a subtle shift in the language, as two different words are used for "I" in the first and second halves of the declaration. The first claim of purity refers to the physical realm, indicating that the person has not actually committed any crime. The second claim, however, deals with the mind. Even if the intention to sin crossed the person's thoughts, the wrongdoing is not attributed to him. In this context, being "covered" means the person is enveloped by God's foreknowledge. The shift in the word used to say "I" serves to remove the person's exclusive responsibility, highlighting that human actions are ultimately compelled by God's overarching knowledge, and therefore, no sin can truly be blamed on the individual [מלבי״ם].