“We may fight against what is wrong, but if we allow ourselves to hate, that is to insure our spiritual defeat and our likeness to what we hate.”

Anita's musings on Richard, the reluctant werewolf; unidentified edition/page
Anita Blake: Vampire Hunter series, Narcissus In Chains (2001)

Source: Invisible Monsters

(1836-1) (Vol.46) Experience
The Monthly Magazine

Source: The Chronicles of Thomas Covenant, the Unbeliever

A History of God (1993)

Nobel lecture (2001)
Context: In every great faith and tradition one can find the values of tolerance and mutual understanding. The Qur’a, for example, tells us that "We created you from a single pair of male and female and made you into nations and tribes, that you may know each other." Confucius urged his followers: "when the good way prevails in the state, speak boldly and act boldly. When the state has lost the way, act boldly and speak softly." In the Jewish tradition, the injunction to "love thy neighbour as thyself," is considered to be the very essence of the Torah.
This thought is reflected in the Christian Gospel, which also teaches us to love our enemies and pray for those who wish to persecute us. Hindus are taught that "truth is one, the sages give it various names." And in the Buddhist tradition, individuals are urged to act with compassion in every facet of life.
Each of us has the right to take pride in our particular faith or heritage. But the notion that what is ours is necessarily in conflict with what is theirs is both false and dangerous. It has resulted in endless enmity and conflict, leading men to commit the greatest of crimes in the name of a higher power.
It need not be so. People of different religions and cultures live side by side in almost every part of the world, and most of us have overlapping identities which unite us with very different groups. We can love what we are, without hating what — and who — we are not. We can thrive in our own tradition, even as we learn from others, and come to respect their teachings.

Attributed