"There is no such thing as an underestimate of average intelligence" — Henry Brooke Adams

If the lion was advised by the fox, he would be cunning

Source: The Marriage of Heaven and Hell (1790-1793)

Happiness in intelligent people is the rarest thing I know

It is impossible to underrate human intelligence - beginning with one's own

Man is the most intelligent of the animals - and the most silly

Man becomes man only by his intelligence, but he is man only by his heart

It is the mark of a truly intelligent person to be moved by statistics

Henry Brooke Adams Quote