Take the opinion held, the polarity desired, and the law expressed and encapsulate them into one object, determine whether the object would feel light or heavy to a source of conduct and you would have discovered weight. A command is a law that has weight. A permission is a law without weight. To a source of conduct, a command feels heavy; a permission feels light. A command and a permission feel differently to a source of conduct because a command is a lawmaker intruding upon the decision making process of a source with respect to a flow of conduct and a permission is an absence of intrusion. Weight indicates whether a lawmaker is attempting to turn a flow of conduct on or off or whether a lawmaker is abstaining from interfering. A lawmaker imposes weight upon a source of conduct or withholds it. Hence, weight is either present or absent. The presence of weight is represented by a 'token' called a ‘duty’; the absence of weight is represented by a 'token' called a ‘privilege’. A privilege indicates a freedom from a lawmaker’s weight; A ‘duty’ indicates that a lawmaker’s weight burdens a source of conduct. A lawmaker binds a command to a source by handing the source a duty. A lawmaker binds a permission to a source by handing the source a privilege. Think of a general pinning a medal on the tunic of a soldier. Binding a law to a source with weight is one of the three activities that a lawmaker does in making a law
In A Unified Theory of a Law, there are four (4) relationships, one (1) of which is factual and three (3) of which are legal. Weight is one of the three legal relationships. It is a relationship between a lawmaker and a source of conduct. Furthermore, binding a law to a source with weight is depicted in Columns 1 and 2 on the Periodic Table of the Elements of a Law®. In binding a law to a source with weight, the legal focus is upon the source.
In summary, the constant - variable - values relationship here is weight. Its variable holds two values: a duty or a privilege.
The following concepts are explained in the Glossary:

