While listening to JapJi Sahib katha by [[Satpal Singh]] (Nanak Naam), I really found the point about sin to be fascinating. He explains that M1 is telling us the only sin is not remembering Vaheguru. Our ignorance is the only sin. In [[18 - ਅਸੰਖ ਮੂਰਖ ਅੰਧ ਘੋਰ ॥|Pauree 18 of Jap Ji Sahib]], ਅਸੰਖ ਪਾਪੀ ਪਾਪੁ ਕਰਿ ਜਾਹਿ ॥ has an unkar under the word ਪਾਪੁ, which makes it singular. One sin. Contrast this to the spelling of [[ਪਾਪ (paap)]] in the shabad [[ਹਮ ਡੋਲਤ ਬੇੜੀ ਪਾਪ ਭਰੀ ਹੈ ਪਵਣੁ ਲਗੈ ਮਤੁ ਜਾਈ ॥]] and we see it is referring to multiple sins.