Human nature exists and operates in an environment. And it is not 'in' that environment as coins are in a box, but as a plant is in the sunlight and soil.

All genuine learning comes through experience.

That which distinguishes the Soviet system both from other national systems and from the progressive schools of other countries is the conscious control of every educational procedure by reference to a single and comprehensive social purpose.

The struggle for democracy has to be maintained on as many fronts as culture has aspects: political, economic, international, educational, scientific and artistic, religious.

The importance of language in gaining knowledge is doubtless the chief cause of the common notion that knowledge may be passed directly from one to another. It almost seems as if all we have to do to convey an idea into the mind of another is to convey a sound into his ear. Thus imparting knowledge gets assimilated to a purely physical process.

Even dogs and horses have their actions modified by association with human beings; they form different habits because human beings are concerned with what they do.

Inference is always an invasion of the unknown, a leap from the known.