The essential thing is to arouse such an interest that it engages the child’s whole personality.

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

Growth is not merely a harmonious increase in size, but a transformation.

All human victories, all human progress, stand upon the inner force.

One test of the correctness of educational procedure is the happiness of the child.

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

A humankind abandoned in its earlier formative stage becomes its own greatest threat to survival.