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Education is a crutch with which the foolish attack the wise to prove that they are not idiots

Erudition can produce foliage without bearing fruit.

A book is a mirror: If an ass peers into it, you can't expect an apostle to look out

One's first step in wisdom is to question everything - and one's last is to come to terms with everything

In everything that relates to science, I am a whole Encyclopaedia behind the rest of the world.

The only means of strengthening one's intellect is to make up one's mind about nothing , to let the mind be a thoroughfare for all thoughts, not a select party