to sound.

26. Logic. The laws of number and measure applied to thought.

27. The Invention of Harmony.

You see now--by taking first the great division of pre-Christian and
Christian arts, marked by the door of the Tower; and then the divisions
into four successive historical periods, marked by its angles--that you
have a perfect plan of human civilization. The first side is of the
nomad life, learning how to assert its supremacy over other wandering
creatures, herbs, and beasts. Then the second side is the fixed home
life, developing race and country; then the third side, the human
intercourse between stranger races; then the fourth side, the
harmonious arts of all who are gathered into the fold of Christ.

Now let us return to the first angle, and examine piece by piece with
care.

1. _Creation of Man._

Scarcely disengaged from the clods of the earth, he opens his eyes to
the face of Christ. Like all the rest of the sculptures, it is less the
representation of a past fact than of a constant one. It is the
continual state of man, 'of the earth,' yet seeing God.

Christ holds the book of His Law--the 'Law of life'--in His left hand.

The trees of the garden above are,--central above Christ, palm
(immortal life); above Adam, oak (human life). Pear, and fig, and a