Who said “What makes loneliness an anguish is not that I have no one to share my burden, but this:…”?

“The surest cure for vanity is loneliness.”

“I was never less alone than when by myself.”

“The eternal quest of the individual human being is to shatter his loneliness.”

“We're all of us sentenced to solitary confinement inside our own skins, for life!”

“Loneliness is never more cruel than when it is felt in close propinquity with someone who has ceased to communicate.”

“Time goes by, reputation increases, ability declines.”

“In our era, the road to holiness necessarily passes through the world of action.”

“We are not permitted to choose the frame of our destiny. But what we put into it is ours.”

“Life only demands from you the strength you possess. Only one feat is possible — not to have run away.”

“Your cravings as a human animal do not become a prayer just because it is God whom you ask to attend to them.”

“In the last analysis it is our conception of death which decides our answers to all the questions life puts to us.”