Ralph Waldo Emerson said this quote

“ Solitude, the safeguard of mediocrity, is to genius the stern friend, the cold, obscure shelter where moult the wings which will bear it farther than suns and stars. He who should inspire and lead his race must be defended from travelling with the souls of other men, from living, breathing, reading, and writing in the daily, time-worn yoke of their opinions. In the morning, — solitude; said Pythagoras; that Nature may speak to the imagination, as she does never in company, and that her favorite may make acquaintance with those divine strengths which disclose themselves to serious and abstracted thought. 'Tis very certain that Plato, Plotinus, Archimedes, Hermes, Newton, Milton, Wordsworth, did not live in a crowd, but descended into it from time to time as benefactors: and the wise instructor will press this point of securing to the young soul in the disposition of time and the arrangements of living, periods and habits of solitude. ”