belief
faith
conviction
persuasion
principle
例句：
这理论否定了一切传统信念。
This theory is a negation of all traditional beliefs.
她始终坚持自己的信念。
She always holds to her convictions.
她的社会主义信念来自她对社会上不公平现象的痛恨。
Her socialist beliefs were born of a hatred of injustice.
他按照自己的信念行事。