Thomas Edison received three months of formal education at the age of eight before his mother homeschooled him. Benjamin Franklin quit school at age ten, Charles Dickens at twelve.

Lorenzo de’ Medici once observed a young sculptor complete the head of an old and wrinkled faun whose mouth he had rendered open. While astonished at the craftsmanship, Lorenzo pointed out that old men never have all their teeth. Once the great patron of the arts had left, the artist knocked out one of the teeth; when Lorenzo returned and saw the statue again, he was so taken with the new version that he decided to adopt the artist, whose name was Michelangelo.

“I went sailing up to Great Point, which is fourteen miles. It was fine and rough so we went out in the open ocean and shipped water grandly. I have bought a large swordfish sword for the agassiz of an old salt by the name of Judas,” Ernest Hemingway wrote to his brother Marcelline in one of his earliest known letters, shortly after his eleventh birthday, in 1910.

The first lines spoken by the old shepherd in William Shakespeare’s The Winter’s Tale are, “I would there were no age between ten and three-and-twenty, or that youth would sleep out the rest; for there is nothing in the between but getting wenches with child, wronging the ancientry, stealing, fighting.”

As a child in Mexico in the 1650s, the nun and writer Sor Juana Inés de la Cruz “abstained from eating cheese because I had heard that it made one slow of wits, for in me the desire for learning was stronger than the desire for eating—as powerful as that is in children.”