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.

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

For my part, the more I went forward in the study of letters, and ever more easily, the greater became the ardour of my devotion to them, until in truth I was so enthralled by...