“The mind has formed itself by a special exercise of attention, observing, comparing, and classifying.”
Montessori describes repeated acts of attention and comparison as formative intellectual practice that organizes experience instead of merely supplying memorized content.
Source details
Dr. Montessori's Own Handbook, discussion of sensory didactic material. The statement reflects Montessori’s historical theory of mental development and is not labeled as a current neuroscientific finding.