“Anger is not bitterness. Bitterness can go on eating at a man's heart and mind forever. Anger spends itself in its own time.”

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

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

“There was no time for bitterness now: eat bitterness, and bitterness eats you.”

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

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

“I have learnt through bitter experience the one supreme lesson to conserve my anger, and as heat conserved is transmuted into energy, even so our anger controlled can be transmuted into a power which can move the world.”

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

“Can such bitterness enter into the heart of the devout?”

“A proud heart can survive general failure because such a failure does not prick its pride. It is more difficult and more bitter when a man fails alone.”