Since ancient times, it has been thought that music has the ability to affect our emotions, intellect, and psychology; it can assuage our loneliness or incite our passions. The Ancient Greek philosopher Plato suggests in "The Republic" that music has a direct effect on the soul. Therefore, he proposes that in the ideal regime, music would be closely regulated by the state (Book VII). There has been a strong tendency in the aesthetics of music to emphasize the paramount importance of compositional structure; however, other issues concerning the aesthetics of music include lyricism, harmony, hypnotism, emotiveness, temporal dynamics, resonance, playfulness, and color (see also musical development).