If you have a poorly lit large saloon, apart from large and bulky items, you will be limited in what you can see. However, if you light it up intensely, you will be able to see even tiny pieces of paper and litter.
The “Nur” or Divine Light of normal people are dim, so only the large sins are apparent and can be seen. However, infallible Prophets and Imams have such intense Divine Light that even if a moment is spent of their lifetime that could have been spent in a better way, they fall in to prayers and weep.
Another example is that of extending your feet in front of others. This act is neither haram (sinful) nor makrooh (disliked), however we see that when a person’s legs are painful and they extend it towards others, they seek the pardon of others around them, because in respect of others, even “mubah” actions (neither liked nor disliked, neither halal nor haram) may embarrass us.
Another example, when a newsreader clears their throats on live television or radio, they seek the pardon of the viewers or listeners. This is again not a sinful act yet we see them seeking pardon from their viewers and listeners in respect, because they regard themselves to be in front of an audience.
The Representatives of God are so aware of their Creator that if they worship and glorify God as much as all the humans and Jinn, they consider themselves blameworthy.