If someone prays to God in private, does it matter what we wear? If our clothes have a tiny stain, burn mark, tear, that sort of thing, does God reject our prayer? Do we even have to wear clothes to pray? I know it would probably be disrespectful to pray in dirty clothes (not as in wearing them all day, as in having dirt, more than just a tiny speck of food, that sort of thing on them), but just how much does God care about what we wear?
When we come before God, regardless of what we wear, we come before God as naked sinners, beggars, with open hands of faith and all that we receive is the gift and mercy of God. It is God who clothes us, not with clothes of fabric or linens, but with the clothing of Christ's righteousness, as we read, "For as many of you as were baptized into Christ have put on Christ." (Galatians 3:27), we have been clothed with Christ; so that our nakedness is no longer.
We do not come to God as fit; but rather God comes to us to make us fit. It is God who comes to us, comes down, and clothes our nakedness. That we are found to be the righteousness of God; not with a righteousness that is our own, but rather that righteousness which is from God as a gift, the righteousness which is through faith--that is, Christ Himself who is our righteousness.
So that when we come before God in prayer, naked in our sins and as beggars; we have clothing from God which clothes us; we have the riches of God as grace; we have Christ our High Priest and Advocate who has given us all good things which are from God as pure gift. So that even as naked beggars, we are kings and priests of God forever.
That which adorns our bodies is not what matters; what matters is the garments of mercy with which we have been clothed in Jesus Christ, such that though beggars, those who were formally hostile toward God, are nevertheless brought into the household of God, gathered and seated at His Table, and heirs of His promises. Ours is the Feast that is to come, of which we are partakers even now by the loving kindness of God in Jesus Christ.
-CryptoLutheran