"There is, in Peanuts, an underlying and profound sadness which reflects not only Schulz's own struggles with depression but his sensitivity to the quiet terrors of human loneliness. "The most terrifying loneliness is not experienced by everyone and can be understood by only a few," Schulz said. "I compare the panic in this kind of loneliness to the dog we see running frantically down the road pursuing the family car. He is not really being left behind, for the family knows it is to return, but for that moment in his limited understanding, he is being left alone forever, and he has to run and run to survive." It is this heart-stopping poignancy which gives indisputable credibility to Schulz's work. The great artists, wrote the poet Edward Thomas, have seen what they have imagined. Surely this is true of Schulz."