In the heart of a bustling city, there was a small, hidden café known as "The Golden Rule." Its owner, a kind-hearted woman named Maria, had a simple yet powerful motto. Customers who entered were greeted with warmth, and they soon discovered that the more they adhered to this principle, the more the café became a place of connection, where kindness and respect were the currency of choice. If someone couldn't pay for their meal, someone else would step in to help. If someone accidently dropped their utensils on the floor, a nearby stranger would swoop in to pick it up. Everyone treated each other with kindness, and it was all due to Maria's motto. Word of cafe spread, and its message inspired all who walked through its doors to carry that spirit of empathy and consideration into their daily lives, making the city a better place for all.
Based on the story, what do you think Maria's motto was?