Believe it or not, the Bible has a clear answer for the question, “Mommy, why do I have to take a shower?.”
As followers of Jesus, we need to model Christ in every aspect of our life. Since God is a God of purity (see Psalms 12:6), we need to imitate this on both the inside and on the outside of our beings. While having a pure heart is much more important to God than having a clean body (see Luke 11:39), there is a tendency to associate what is on the outside with what is on the inside.
Revelation 3:4 says: “Thou hast a few names even in Sardis which have not defiled their garments; and they shall walk with me in white: for they are worthy.” Although, the association here is made in the opposite direction, with the heart being likened to the clothes that are worn on the outside, there is a clear connection between the inside of the heart, and the clothes on the outside.
“Set your affection on things above, not on things on the earth.” – Colossians 3:2
While being dirty on the outside is not a sin, we should strive to imitate things above when achievable. Since in heaven everything is pure and clean, we should try to do the same on earth. Clearly, this is an imperfect world, and dirt will tend to accumulate on our earthly clothes (mothers know this), but when possible, the principle of cleanliness is important to keep.
“Let us draw near with a true heart in full assurance of faith, having our hearts sprinkled from an evil conscience, and our bodies washed with pure water” – Hebrews 10:22