Your clothing communicates an attitude toward the goals you are pursuing. People see what you are before they hear what you are.
You are a walking message system to others. Even Joseph dressed to create acceptance in the palace of Pharaoh.
“Then Pharaoh sent and called Joseph, and they brought him hastily out of the dungeon: and he shaved himself, and changed his raiment, and came in unto Pharaoh.”
(Genesis 41:14)