“Everything human is pathetic. The secret source of humor itself is not joy but sorrow. There is no humor in heaven.”

“When sorrows come, they come not single spies, but in battalions.”

“I have no special talents. I am only passionately curious.”

“God's most lordly gift to man is decency of mind.”

“As we advance in life it becomes more and more difficult, but in fighting the difficulties the inmost strength of the heart is developed.”

“Never let your schooling interfere with your education.”