The art of economics consists in looking not merely at the immediate but at the longer effects of any act or policy it consists in tracing the consequences of that policy not merely for one group but for all groups.
Although all the good arts serve to draw man's mind away from vices and lead it toward better things this function can be more fully performed by this art which also provides extraordinary intellectual pleasure.
To know how to suggest is the great art of teaching. To attain it we must be able to guess what will interest we must learn to read the childish soul as we might a piece of music. Then by simply changing the key we keep up the attraction and vary the song.
In every work of art the subject is primordial whether the artist knows it or not. The measure of the formal qualities is only a sign of the measure of the artist's obsession with his subject the form is always in proportion to the obsession.