“By doubting we come to the question, and by questioning we may come upon the truth.”
“The beginning of wisdom is found in doubting; by doubting we come to the question, and by seeking we may come upon the truth.”
“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.”
“By doubting we come to enquiry, and through enquiry we perceive truth.”
“The question that is upon my lips (please forgive me) is the doubt in your heart”