What is the soul's structure?

You may believe that the spirit, when it passes away from the corporeal form, will retain, through all eternity, its original size and height. This is a mistake. 

The spirit, as it advances in knowledge and wisdom progresses also in its structure, attaining the size and height it would have attained had it remained in the earthly form of its destined age.

To suppose that the little infant, for instance, will retain its tiny figure, through all duration, without expanding its stature in the slightest degree is unsubstantiated by either reason or nature. 

The idea that the spirit remains at a standstill, at a point of height, when it leaves the earth is absurd and unphilosophical. It must expand exteriorly in proportion to its interior growth. 

The untutored infant will no more retain forever in spirit life the primitive form of the earth than it would if living on earth.

As its intellectual capacities unfold, its little soul will magnify accordingly until you see no longer the baby form but a beautiful and expanded spirit, wearing the robe of wisdom-perfected manhood or womanhood.