“Bitterness: anger that forgot where it came from.”

“Hurt leads to bitterness, bitterness to anger. Travel too far that road and the way is lost.”

“Bitterness is like cancer. It eats upon the host. But anger is like fire. It burns it all clean.”

“The East would always present that calm face of faint astonishment, unmoved at the anger, not understanding the bitterness.”

“The tear rose in Miss Marple's eyes. Succeeding pity, there came anger - anger against a heartless killer. And then, displacing both these emotions, there came a surge of triumph - the triumph some specialist might feel who has successfully reconstructed an extinct animal from a fragment of jawbone and a couple of teeth.”

“Bridget's anger evaporated and the sadness came back. The anger was easier. She owned and controlled it, whereas the sadness owned her.”

“…He is driven by bitterness and anger. You can understand that.’
Nico wanted to yell, Like you know what I feel?”

“Anger is a symptom, a way of cloaking and expressing feelings too awful to experience directly—hurt, bitterness, grief and, most of all, fear.”

“From these beginnings, as it were, have issued bitterness, contentious obstinancy, lack of amenity, hasty judgement, anger, and an intense desire for revenge—to say nothing of headstrong will; that which many damn, by word at least, was my delight.”

“Where there is anger there is always pain underneath.”