Only the most ignorant people will believe the old saying that seeing is believing. What you see is the first thing you need to doubt. -Ayn Rand's "Source"
He doesn't understand the concept of sin. He thinks he is innocent. It is this innocence that makes him lawless. He is strict with himself, living by what he knows, seeing is believing, taking things as they are, and not letting anything unreliable get involved. -albert camus's The Myth of Sisyphus
People who often tell lies want to hear the truth, but in fact, it is difficult for them to hear the truth. Because, even if it is true, it will become a lie in their skeptical ears. In these people's minds, they prefer to believe that seeing is believing, but hearing is empty. They finally make things difficult for themselves by deceiving others. -Ma De "When I Let Go of Myself"
Experienced people read books with two eyes, one eye sees the words on the paper, and the other eye sees the back of the paper. -Goethe's Faust