rely on hearsay; trust one’s ears rather than one’s eyes ❍ 事实证明，～，往往上当。Facts have proved that those who rely on hearsay always let themselves be fooled.
贵耳贱目ɡuì ěr jiàn mù
重视耳闻，轻视眼见。形容轻信传闻，不信事实。rely on hearsay, trust one’s ears rather than one’s eyes