It is the human spirit.
The human is a separate spirit in its own right.
It is childlike in its simplicity and radiates enthusiasm for life.
To deny the existence of the human spirit is to be bereft of wisdom.
We tend to relate the human strongly to the child, because in young children we can see the human in its natural, happy state.
The human loves to communicate and reaches out freely. It loves to build and relates strongly to the physical world.
The human is just interested in having a successful and joyful life for itself and the body.
As life goes on the human can get suppressed. It gets overwhelmed with the heavy situations life can present, and if it is not respected and acknowledged properly, can lose its vibrancy.
The human spirit is very buoyant. If a person is able to remove the heavy energy that suppressed the human, it will bounce back and the original joy of life experienced as a child will return.