For example, Rene Magritte' s "The Son of Man" is a surrealist oil painting that was painted in 1964. The painting is a self-portrait of a man wearing a white shirt, red tie, red gloves, a bowler hat, and a long two-button suit jacket. The man stood in front of a low stone wall overlooking the sea, with a bright green apple covering his face and four green leaves covering his face. The man's left arm, his elbow bent back, his eyes peering slightly into his face from behind the apple. The sky is overcast and gives a feeling of depression and sadness, but the sea senses a calm mood.

Apple, hidden visible but hidden human face. This shows that everything we see hides something else, and we always want to see what is hidden by what we see.

So, the essence of this painting is to make us realize that one thing hides another thing. This concept is universal not only in physics, but also in philosophy and all other contexts. Even in everyday life, when we perceive things clearly, there are hidden consequences that we don't see until they are in front of us.