"You never say anything straight out. It's all I believe this or I've found that. You never say, The sun rises in the morning. It's always, I think the sun rises in the morning. It's like you're trying not to promise anything."

[...]

"I'm surprised you noticed that," he said, then smiled at having done it again. "I have a talent for being believed, and I've found it to be problematic. I suppose I've adopted habits to soften the effect, and so I try not to assert things unless I'm certain of them. Absolutely certain, I mean. I'm often surprised by how little I'm absolutely certain of."

-- The Dragon's Path by Daniel Abraham