A simple villager once visited the big city. It was a cold, wintry day, and the villager was dressed warmly. He wore several layers of clothing - a sweater, a light coat, and an overcoat. He walked along the storefronts, gawking at the sights and marvels of the big city. Suddenly he spied a beautiful white silk shirt, displayed prominently in the glass window of one of the stores. He had never seen such a beautiful shirt before.
Excited, the villager entered the store and inquired about the shirt. The salesman brought him a silk shirt that was his size. He was about to help the villager try on the shirt when another customer entered the store, asking for assistance.
The villager was impatient to see how the beautiful silk shirt would look on him. While the salesman was occupied with the other customer, he unbuttoned the buttons, took out the pins and bits of paper, and tried to slip on the shirt. He tugged the first sleeve on his arm. The second sleeve was harder, going over his arm only after much struggling and contortions.
But no matter how much he tried, he could not button the shirt. It was simply too small.
When the salesman returned, the villager complained, "You promised to give me a shirt my size!"
"Certainly," replied the salesman. "This shirt is your size. But before putting on the shirt, you must first take off your coat and sweater..."
Removing the Barriers
We are all like that simple villager. Over time, our pure soul gets covered with layers of sludge and slime - fits of anger, feelings of jealousy and greed, and other undesirable character traits. If we want to keep mitzvot - which are called levushei deMalka, "clothes of the King" - we should first rid ourselves of these barriers that come between us and God. If we do not purify ourselves, we will be like the villager, thinking that the beautiful "clothes of the King" do not really suit us ...
That is what it says in the Shema, "These words shall be on your hearts" (Deut. 6:) - the words of Torah need to be directly on the heart, without any barriers...
Adapted from Meshalim Ve-gam Sipurim, p. 19