Ignorance and inconsideration are the two great causes of the ruin of mankind

Ignorance and inconsideration are the two great causes of the ruin of mankind

Naivete in grownups is often charming; but when coupled with vanity it is indistinguishable from stupidity.

Naivete in grownups is often charming; but when coupled with vanity it is indistinguishable from stupidity.

There is nothing more frightful than an active ignorance.
[Ger., Es ist nichts schrecklicher als eine thatige
Unwissenheit.]

There is nothing more frightful than an active ignorance.
[Ger., Es ist nichts schrecklicher als eine thatige
Unwissenheit.]

It is not ignorance but knowledge which is the mother of wonder.

It is not ignorance but knowledge which is the mother of wonder.

I do not pretend to know where many ignorant men are sure -- that is all that agnosticism means.

I do not pretend to know where many ignorant men are sure -- that is all that agnosticism means.

Nothing is so dangerous as an ignorant friend; a wise enemy is
worth more.
[Fr., Rien n'est si read more

Nothing is so dangerous as an ignorant friend; a wise enemy is
worth more.
[Fr., Rien n'est si dangereux qu'un ignorant ami;
Mieux vaudrait un sage ennemi.]

Being ignorant is not so much a shame, as being unwilling to learn.

Being ignorant is not so much a shame, as being unwilling to learn.

By ignorance we mistake, and by mistakes we learn

By ignorance we mistake, and by mistakes we learn

The recipe for perpetual ignorance is: Be satisfied with your opinions and content with your knowledge.

The recipe for perpetual ignorance is: Be satisfied with your opinions and content with your knowledge.