This system in which a child is constantly moving objects with his hands and actively exercising his senses, also takes into account a child's special aptitude for mathematics. When they leave the material, the children very easily reach the point where they wish to write out the operation. They can thus carryout an abstract mental operation and acquire a kind of natural and spontaneous inclination for mental calculations.

The child's true constructive energy, a dynamic power, has remained unnoticed for thousands of years. Just as men have trodden the earth, and later tilled its surface, without thought for the immense wealth hidden in its depths, so the men of our day make progress after progress in civilized life, without noticing the treasures that lie hidden in the psychic world of infancy.

It is in the encounter of the maternal guiding instincts with the sensitive periods of the newly born that conscious love develops between parent and child.

How often is the soul of man - especially in childhood - deprived because he is not allowed to come in contact with nature.

The whole of mankind is one and only one, one race, one class and one society.

Free choice is one of the highest of all the mental processes.

The work of education is divided between the teacher and the environment.