belief
belief(信念,可以强烈也可以普通:a common belief = 普遍认为;core belief = 核心信念)
conviction
conviction(坚定信念,强调深刻确定性:a firm conviction = 坚定信念;carry conviction = 令人信服;比 belief 更强调个人深信)
Her belief that climate change poses an existential threat to humanity motivated her to become an environmental activist.
她认为气候变化对人类构成生存威胁的信念促使她成为一名环保活动人士。
He spoke with such deep conviction that even his opponents found it difficult to dismiss his arguments.
他以如此深刻的信念发言,以至于连他的反对者也发现很难驳斥他的论点。