Yes, remember your Creator now while you are young, before the silver cord of life snaps and the golden bowl is broken. — Ecclesiastes 12:6
The silver cord is an energetic umbilicus connecting both the physical and spiritual bodies. It stays in tact for the duration of a person’s physical life. Upon death the silver cord severs and the spirit is released to travel onward within the world of Spirit.
Every night each one of us leaves our physical body and travels within the astral levels, with the silver cord firmly grounding us to our bodies. Many people who have experienced astral projection or lucid dreaming claim to have clearly seen this cord, describing it as long and bright. Experienced astral projectors deliberately use this cord to quickly return to the body at the conclusion of their astral travels.
The silver cord can be located in a variety of places on the human body, usually coinciding with the major chakras. Most commonly cited locations include the solar plexus and crown area of the head. One can train themselves to determine their own silver cord location by retaining and sustaining awareness during the act of falling asleep. The separation of the spirit from the physical body is typically heralded by pronounced physical sensations such as rushes of electricity and a loud rumbling, locomotive-type sound within the head and body. If one maintains awareness during this process they can typically observe the “exit point” of the spirit, which would be the location of the silver cord.
The silver cord is a literal energetic pathway through which we can experience the celestial, travel inter-dimensionally, and access the higher levels of Spirit. As long as the cord is unbroken we are assured that nothing will happen to the physical body while we are away. If something does stimulate the physical body during our travels, the spirit immediately returns to the body and the individual rouses. This becomes a nuisance to most experienced projectors, who typically take great pains to ensure they are undisturbed while undergoing OBEs. Any stimulation of the physical body usually means the cessation of the astral experience, unless a person can train themselves to withstand the physical sensations.