Leslie Stephen,
Dictionary of National Biography
(1901)
“ He had been led to philosophical studies during his undergraduate career. He had at the beginning of his second year joined the well-known 'Apostles' Society. Its purpose was to encourage the frank and full discussion of every possible question. Sidgwick, though one of the youngest men of the same university standing, showed a remarkable maturity of intellect, which enabled him to take a leading position in the society. The discussions also revealed to him the natural bent of his mind. He resolved to devote his life to the study of great philosophical problems. ”
