Ryokan never preached to or reprimanded anyone. Once his brother asked Ryokan to visit his house and speak to his delinquent son. Ryokan came but did not say a word of admonition to the boy. He stayed overnight and prepared to leave the next morning. As the wayward nephew was lacing Ryokan's straw sandals, he felt a warm drop of water. Glancing up, he saw Ryokan looking down at him, his eyes full of tears. Ryokan then returned home, and the nephew changed for the better
Source - http://www.shambhala.com/html/catalog/items/isbn/978-0-8348-0126-4.cfm?selectedText=EXCERPT_CHAPTER
