There is the greatest difference in the amount of detail which the eyes
of different persons gather from a glance at an object. Some will only
see a tree; others in the same time will see a tree with spreading
branches, small irregularly shaped leaves, with small black berries and
a rough vertically marked bark. Children should be trained to notice as
much detail as possible. Development along this line becomes a basis
for many other mental operations which will be discussed later on.