You don’t have to believe in the gravity to see it work. The law of gravity is always working. Drop a pen on the ground and you will have an instant reference point that gravity is real. The belief you had about it at first, will be good for a few seconds then you will watch the pen fall on the ground at the same speed no matter how many times you drop it on the ground. A law is made one because it always works in a calculated manner. The law is something you can put your money on. You can place a bet on it. It is always working. The law of attraction is a sure thing just as the law of gravity is.