“The beginning of wisdom is found in doubting; by doubting we come to the question, and by seeking we may come upon the truth.”

“By doubting we come to the question, and by questioning we may come upon the truth.”

“Against the disease of writing one must take special precautions, since it is a dangerous and contagious disease.”

“Assiduous and frequent questioning is indeed the first key to wisdom... for by doubting we come to inquiry; through inquiring we perceive the truth...”

“The key to wisdom is this -- constant and frequent questioning ... for by doubting we are led to question and by questioning we arrive at the truth.”

“The problem with learning the truth about things is that you lose the confidence that comes from being dumb.”

“By doubting we come to enquiry, and through enquiry we perceive truth.”