We dress up differently for different occasions, to match up to the occasion and to efficiently fulfill our tasks.
A sprinter cannot wear a traditional ethnic dress and expect to win in the race, he needs to be perfectly dressed for maximum speed.
Our spiritual person has a dress for the very purpose of a victorious spiritual life.
"Stand therefore, having girded your waist with truth, having put on the breastplate of righteousness, and having shod your feet with the preparation of the gospel of peace; above all, taking the shield of faith with which you will be able to quench all the fiery darts of the wicked one. And take the helmet of salvation, and the sword of the Spirit, which is the word of God; praying always with all prayer and supplication in the Spirit, being watchful to this end with all perseverance and supplication for all the saintsó and for me, that utterance may be given to me, that I may open my mouth boldly to make known the mystery of the gospel, for which I am an ambassador in chains; that in it I may speak boldly, as I ought to speak." Ephesians 6:14-20 (NKJV)
The highlighted in the verse above is what is needed for our Spiritual person and the very purpose of our existence is to boldly proclaim the goodness of the Lord.
Without our Spiritual dress, we would never be efficient in proclaiming the goodness of our Lord, for if we have a very good God to be preached about, we also have a very bad devil to create obstacles in this noble task and thus we need to be adequately dressed to combat the devil and to preach for the Lord.
Do not mistaken that this dress is only required by street preachers, Pastors and famous Christian preachers, it is a must for everyone who wants to proclaim the goodness of the Lord, by words and by life's example.
Someone truly said, 'Preach the gospel, if need be use words.', thus we preach more by our own life than just by our words.
Dressing up our spiritual person is not a burden, rather a privilege and comfort for this is God's perfect will for us for our successful spiritual life.