Ezekiel 42 verse 14 says, speaking of the chambers in the temple:
14 When the priests enter them, they shall not go out of the holy chamber into the outer court; but there they shall leave their garments in which they minister, for they are holy. They shall put on other garments; then they may approach that which is for the people.”
The priests were not to go out of the holy place where they performed sacrifices and other priestly duties, out to the court of the people without first taking off their garments, because as the verse says those garments were holy, consecrated and ceremonially holy. They were to wear other garments when they mingled and interacted with the every day people.
The reverse would have been true. When the priests went back to the holy place to perform their duties, to offer sacrifices to God, they would have had to change back into the garments they ministered in.
Approaching God required a change of clothes. The priests couldn’t approach God in clothes they had been in with the common, everyday people.
This gives us a picture of how we approach God. The common everyday people speak to me of the world and its values and this is a reminder that in approaching God, to walk closely with Him, there are “clothes” we must put off and “clothes” we must put on.
Clothes speak to me of attitudes, outlook and values. In our relationship with God, the world’s way of viewing life and doing life doesn’t work. We must put off those things and put on Christ’s attitude, outlook and values.
Like the priests, to approach God, we need a change of clothes.