Love and the hope of it are not things one can learn; they are a part of life's heritage.

Children become like the things they love.

Whoever touches the life of the child touches the most sensitive point of a whole which has roots in the most distant past and climbs toward the infinite future.

First the education of the senses, then the education of the intellect.

We must therefore turn to the child as to the key to the fate of our future life.

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.

No one can help us to achieve the intimate isolation by which we find our secret worlds, so mysterious, rich and full. If others intervene, it is destroyed. This degree of thought, which we attain by freeing ourselves from the external world, must be fed by the inner spirit, and our surroundings cannot influence us in any way other than to leave us in peace.