Authors:

He's not a liar at all. Not about important things. He'll tell you horrible truths, but he won't lie." She paused before she added quietly: "That's why it's generally better not ask him anything unless you know you can stand to hear the answer.

Cassandra Clare (2012). “Cassandra Clare: The Mortal Instruments Series (5 books): City of Bones; City of Ashes; City of Glass; City of Fallen Angels, City of Lost Souls”, p.150, Simon and Schuster
He's not a liar at all. Not about important things. He'll tell you horrible truths, but he won't lie. She paused before she added quietly: That's why it's generally better not ask him anything unless you know you can