Stone

"Dreams are the touchstones of our characters."

"Never give up. In the end, even the most harmless drop ruins the hardest stone."

"Our wretched species is so made that those who walk on the well-trodden path always throw stones at those who are showing a new road."

"The stone that the builder refused shall be the head corner stone."

"I alone cannot change the world, but I can cast a stone across the waters to create many ripples."