Airs of importance are the credentials of impotence.

Be certain that he who has betrayed thee once will betray thee again.

Learn the value of a man's words and expressions, and you know him. Each man has a measure of his own for everything; this he offers you inadvertently in his words. He who has a superlative for everything wants a measure for the great or small.

There are many kinds of smiles, each having a distinct character. Some announce goodness and sweetness, others betray sarcasm, bitterness and pride; some soften the countenance by their languishing tenderness, others brighten by their spiritual vivacity.

The mingled incentives which lead to action are often too subtle and lie too deep for us to analyze.

He who goes round about in his requests wants commonly more than he chooses to appear to want.

The enemy of art is the enemy of nature; art is nothing but the highest sagacity and exertion of human nature; and what nature will he honour who honours not the human?