Amy Jane at Untangling Tales writes a fabulous analogy between sin and dirty diapers, and encourages us to remember our iniquity and how detestable it is to God every time we have to change one. Read more here. Personally, I thought it was a great analogy and a good reminder. (Even if analogies do break down at some point!)
Proverbs 6:16-19 There are six things that the LORD hates, seven that are an abomination to him:
haughty eyes, a lying tongue, and hands that shed innocent blood, a heart that devises wicked plans, feet that make haste to run to evil, a false witness who breathes out lies, and one who sows discord among brothers.