“He who speaks without modesty will find it difficult to make his words good.”

“It is so difficult - at least, I find it difficult - to understand people who speak the truth.”

“Good words are more difficult to find than emeralds.”

“Truly speaking, it is not instruction, but provocation, that I can receive from another soul. What he announces, I must find true in me, or reject; and on his word, or as his second, be he who he may, I can accept nothing.”

“Ursus stepped forward. 'Watch your tongue when you speak to the goddess!' he snarled.The Doctor frowned. 'I think that would make speaking rather difficult,' he said.He stuck his tongue out and crossed his eyes to look down on it. 'Therterly inghockigal.' he said.”

“He had never been good at expressing himself. What he felt was so big it was difficult to find the words, and even if he could, it was hardly appropriate to write them to someone he had not contacted in twenty years.”