"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"

"Questions are never indiscreet, answers sometimes are"

"Question everything. Learn something. Answer nothing"

"Raising children is an incredibly hard and risky business in which no cumulative wisdom is gained: each generation repeats the mistakes the previous one made"

"On every thorn, delightful wisdom grows, In every rill a sweet instruction flows"

"Do not waste your time on Social Questions. What is the matter with the poor is Poverty; what is the matter with the rich is Uselessness"

"The man who makes everything that leads to happiness depends upon himself, and not upon other men, has adopted the very best plan for living happily. This is the man of moderation, the man of manly character and of wisdom"

"Silence does not always mark wisdom"

"Youth is not a question of years: one is young or old from birth"

"Vanity can easily overtake wisdom. It usually overtakes common sense"

"Nature and wisdom never are at strife"