Metaphor has been proved to reveal a natural connection, on one hand, between language and human thinking in general, and on the other hand, between language use and individual thinking in particular. These features of metaphor will allow us a better understanding of human thought in all fields of our reality. The current paper focuses on the field of education to study the roles of metaphor in the reality of the human activity through a combination of a diachronic and a horizontal approach. It aims to introduce three dimensions of the role of metaphor in the field, that is 1) dissemination of thought, 2) clarification of thought, and 3) research on thought. The study of the dimensions will be completed through the description of underlying principles and supporting scientific background to analyze the aspects of metaphor application, illustrated with examples. The paper arrives at the conclusion that the application of metaphor in education has been with us for thousands of years, and, as a consequence, based on its fundamental feature of high efficiency in social interaction, its application has become multidimensional.