"If there be anything that can be called genius, it consists chiefly in ability to give that attention to a subject which keeps it steadily in the mind, till we have surveyed it accurately on all sides"

In this quote, Robert Quillen is suggesting that true genius lies in the ability to focus and provide undivided attention to a subject. He believes that this level of attention allows one to completely examine and comprehend a subject from all angles. This requires a good deal of psychological discipline and determination, as the subject must remain at the leading edge of the mind till it has been fully explored. Quillen indicates that this level of attention is what sets geniuses apart from others, as it allows them to get a deep and accurate understanding of a subject. In essence, he is highlighting the importance of concentration and devotion in attaining real genius.