Most people tend to work very hard on their outward appearance, but it is the inside that really ought to take our time and attention. If we take care of the inside first, the outside will take care of itself. We will attend to our hygiene and appearance without giving it undue attention.

God knows our true needs and thus He strengthens the "inner man" through His Spirit (Ephesians 3:16). You really cannot "tell a book by its cover." Putting on the "new man" has to do with building the inner you, filling our lives and minds with the right values (Ephesians 4:20-32).