"John Stuart Mill used to rise at dawn to learn Greek at the age of five"

 John Stuart Mill (1806-1873) was a British politician and philosopher.

Two of his most influential works were Principles of Political Economy, which was published in 1848, and On Liberty, published in 1859. In relation to the first book, he acknowledged the significant contribution of Harriet Taylor (1807-1858), the advocate of women's rights, whom he married in 1851.

He was known for his intellectual precocity as a child; indeed, some sources note that he learnt Greek at the age of three!