Il difetto di giudizio è propriamente quello che si chiama stupidità, difetto cui non c'è modo di arrecare rimedio. Una testa ottusa o limitata, alla… - Immanuel Kant

I express the principle of one's freedom as a human being in this formula: No one can compel me (in accordance with his beliefs about the welfare of others) to be happy after his fashion.

To these spurious principles must be added some others of great affinity with them… First, that by which we assume that everything in the universe is done according to the order of nature, which principle by Epicurus was proclaimed without any restriction, and by all other philosophers unanimously with extremely rare exceptions, not to be admitted but from supreme necessity.

Character means that the person derives his rules of conduct from himself and from the dignity of humanity. Character is the common ruling principle in man in the use of his talents and attributes. Thus it is the nature of his will, and is good or bad. A man who acts without settled principles, with no uniformity, has no character. A man may have a good heart and yet no character, because he is dependent upon impulses and does not act according to maxims. Firmness and unity of principle are essential to character.