The topic is a new method of children intellectual development – trilogy of intellect, the basic thinking operation of which is the logic operation of comparison. The method was created on the basis of Aristotle’s understanding of philosophy as “the science about first reasons and origins” of cognition that must be the starting point of the surrounding world’s cognition at school. In addition to the generally accepted teaching schoolchildren reasonable and mental thinking, a new method is an effective mean of (...) advanced mental children thinking development with the help of general scientific comparative notions – kinds of opposition, that were created in ancient times. Key words: philosophy for children, cognition, intellect, reason, mind, trilogy of intellect, logic paradigm, identical, different, corresponding, opposite. (shrink)