You have to make your cross correctly. When you don’t do it right, the evil spirits not only don’t leave but laugh. And the Virgin Mary is angry. When you make the sign of the cross, you have to put your right hand first on the forehead, then on the navel, then on the right shoulder, and then on the left. The one who puts his hand not on the navel but in the heart turns it upside down. Don’t make the sign of the cross on yourself in the air either. The hand must touch the body. And when you are crossed, you must pray.

— St. Paisios the Athonite