Usage patterns
〈信念〉を持つto hold a conviction/belief
He approaches his work with strong convictions.
〈信念〉を貫くto stick to one's beliefs/principles
Even in a difficult situation, she stayed true to her convictions.
〈信念〉が揺らぐfor one's convictions to waver
After repeated failures, his convictions began to waver.
〈信念〉に基づいて〈動詞〉to act based on one's convictions
He acts based on his own convictions.
〈信念〉を曲げないto not bend/compromise one's convictions
He did not bend his convictions under any pressure.
