"Oh, If I Could But Shiver!" is a German folktale collected by the Brothers Grimm. It is tale number 4 in the collection. It was also included by Andrew Lang in The Blue Fairy Book (1889). - The Grimms' first, 1812 edition contained a much shorter version, "Good Bowling and Card Playing". - It is classified as its own Aarne–Thompson index type 326 of a male protagonist's unsuccessful attempts to learn fear, which eventually leads to his awareness of mortality.
A father had two sons. The younger, when asked by his father what he would like to learn to support himself, said he would like to learn to shudder. A sexton told the father that he could teach the boy. After teaching him to ring the church bell, he sent him one midnight to ring it and came after him, dressed as a ghost. The boy demanded an explanation. When the sexton did not answer, the boy, unafraid, pushed him down the stairs, breaking his leg...
