What is a scientist?... We give the name scientist to the type of man who has felt experiment to be a means guiding him to search out the deep truth of life, to lift a veil from its fascinating secrets, and who, in this pursuit, has felt arising within him a love for the mysteries of nature, so passionate as to annihilate the thought of himself.

When dealing with children there is greater need for observing than of probing

The secret of good teaching is to regard the child's intelligence as a fertile field in which seeds may be sown, to grow under the heat of flaming imagination.

It is necessary, then, to give the child the possibility of developing according to the laws of his nature, so that he can become strong, and, having become strong, can do even more than we dared hope for him.

There is no description, no image in any book that is capable of replacing the sight of real trees, and all of the life to be found around them in a real forest.

The child becomes a person through work.

In the psychological realm of relationship between teacher and child, the teacher's part and its techniques are analogous to those of the valet; they are to serve, and to serve well: to serve the spirit.