Who said “If you are afraid of loneliness, do not marry.”?

“The thoughtful soul to solitude retires.”

“Two Paradises t'were in one, to live in Paradise alone.”

“If you are idle, be not solitary; if you are solitary, be not idle.”

“Solitude is as needful to the imagination as society is wholesome for the character.”

“I live in that solitude which is painful in youth, but delicious in the years of maturity.”

“When an actor has money, he doesn't send letters, but telegrams.”

“Man is what he believes.”

“When a lot of remedies are suggested for a disease, that means it can't be cured.”

“One must be a god to be able to tell successes from failures without making a mistake.”

“Medicine is my lawful wife and literature my mistress; when I get tired of one, I spend the night with the other.”

“Doctors are just the same as lawyers; the only difference is that lawyers merely rob you, whereas doctors rob you and kill you too.”