Who on Earth is Robert Frost?

“By working faithfully 8 hours a day, you may eventually get to be the boss and work 12 hours a day.”

“I never dared to be radical when young/ For fear it would make me conservative when old.”

“I shall be telling this with a sigh
Somewhere ages and ages hence:
Two roads diverged in a wood, and I –
I took the one less traveled by,
And that has made all the difference.”

“In three words I can sum up everything I've learned about life: it goes on.”

“There are tones of voices that mean more than words.”