He who experiments must, while doing so, divest himself of every preconception. It is clear then that if we wish to make use of a method of experimental psychology, the first thing necessary is to renounce all former creeds and to proceed by means of the method in the search for truth.

The adult works to improve his environment while the child works to improve himself.

No social problem is as universal as the oppression of the child

Order is ... the true key to rapidity of reaction.

The child is endowed with unknown powers, which can guide us to a radiant future. If what we really want is a new world, then education must take as its aim the development of these hidden possibilities.

Mental development must be connected with movement and be dependent on it. It is vital that educational theory and practice should be informed by that idea.

We seek to sow life in the child rather than theories, to help him in his growth, mental and emotional as well as physical, and for that we must offer grand and lofty ideas to the human mind.