The definition of truth, goodness and beauty should be based on its value purpose. In the article Three Basic Types of Value, it is pointed out that human orderliness can be divided into three basic types: thinking order, behavior order and physiological order, and the value used to change the process of human orderliness can also be divided into three basic types: thinking value, behavior value and physiological value.

According to the "law of choice tendency", the difference between the value rate of a thing and the average value rate of the subject (called value rate difference) determines the objective significance of the thing to the subject: when the value rate difference of a thing is greater than zero, it has positive significance for the survival and development of the subject, and the subject will continuously increase the scale of value investment in the thing; On the contrary, only negative significance, the main body will continue to reduce the scale of value investment in this thing. This gives the definition of "truth, goodness and beauty":

Truth: It refers to the thinking value things whose value rate difference is greater than zero.

Goodness: refers to the behavior value thing with the value rate difference greater than zero.

Beauty: refers to the physiological value things whose value rate difference is greater than zero.

As the opposite of truth, goodness and beauty, "falsehood, ugliness and ugliness" refer to thinking value, behavior value and physiological value respectively.