“内心冲突”常见的英文表达是 “inner conflict” 。
例句：
He struggled with an inner conflict between his ambition and his conscience.（他在野心与良知之间内心冲突不断，苦苦挣扎。）
The character in the novel experiences profound inner conflict throughout the story.（小说中的角色在整个故事中经历了深刻的内心冲突 。）