A child in his earliest years, when he is only two or a little more, is capable of tremendous achievements simply through his unconscious power of absorption, though he is himself still immobile. After the age of three he is able to acquire a great number of concepts through his own efforts in exploring his surroundings. In this period he lays hold of things through his own activity and assimilates them into his mind.

The more the capacity to concentrate is developed, the more often the profound tranquility in work is achieved, then the clearer will be the manifestation of discipline within the child.

Preventing war is the work of politicians, establishing peace is the work of educationists.

When children come into contact with nature, they reveal their strength.

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

The hands are the instruments of man’s intelligence.

It is well to cultivate a friendly feeling towards error, to treat it as a companion inseparable from our lives, as something having a purpose, which it truly has.