In a sense, the whole point of trying to accept the Lord and align ourselves with His love and His leading is so that we can express what is good in life – so we can actually do things in the world that benefit other people. These external acts are the lowest form of goodness, but are the culmination of the higher forms. And this has a bonding effect – a whole chain of desires for good and true ideas come together in the form of an external act, so that act serves to bring all those desires and ideas together.
This, the Writings tell us, is the internal meaning of girdles and belts in the Bible: They are good external goals that link the things in our hearts and minds into a state of cooperation and one-ness of purpose.
In most cases, girdles are used to cover the genitals. Since the genitals represent the love of marriage, these girdles represent the external good things that support marriage on all its levels: the marriage of husbands and wives, the marriage of what is good and what is true in each of us as individuals, and the ultimate marriage between each of us and the Lord.
Girdles can also serve to hold inner clothing together, with outergarments over it. This represents the separation between two external goals, and the internal things they include.