Opinion is an outcome of mind. It is an outburst of its reasoning and judging faculty. And so, according to the evolution of a particular mind, its opinion is. Opinions clash when two people of different stages of evolution express themselves. Therefore the wise are more reluctant to express their opinion, whereas for the unwise it is easy. A simpleton is only too glad to express his opinion uninvited. In the ancient education of children that was the one thing that was taught from childhood in good families, that the child must not be too ready to express his opinion.