No matter what our work in life, whether scientific, artistic, or domestic, it is the same body through which the power is transmitted; and the same freedom in the conductors for impression and expression is needed, to whatever end the power may be moved, from the most simple action to the highest scientific or artistic attainment. The quality of power differs greatly; the results are widely different, but the laws of transmission are the same. So wonderful is the unity of life and its laws!