In "The Monkey's Paw," the fakir put a spell on the paw to teach people that interfering with fate would only lead to "sorrow." Through the characters of Sergeant-Major Morris and the White family, we see that the fakir was successful in teaching this lesson.
Firstly, despite keeping hold of the monkey's paw, Sergeant-Major Morris admits that it has caused him nothing but "mischief" and that he has no interest in making additional wishes. In fact, as he says to Mr. White, Morris wants to destroy the paw, a sign that he has learned the fakir's lesson:
"Better let it burn," said the soldier solemnly.
In contrast, the White family are very interested in the monkey's paw, but their interest is short-lived. Their first wish, for example, causes the death of their son. This tragic event leads Mrs. White to make a second wish for her son's return, but Mr. White intervenes to prevent this from happening. Mr. White, therefore, has quickly learned the fakir's lesson, but it takes Mrs. White a little bit longer.