Usually, Bardo referred to the transitional period between one life and the next, upon death, one’s spirit leaves t he body, travel through time and space. Without a body” of five Skandhas, one is in the dreamlike state of hallucinations. one did not realized he is dead, he is able to see his own lifeless body laying there, family members surrounding his body, crying or praying, one tries to communicate with family and friends, but unable to, because without the functional physical aggregates of the month , voice etc. then one tries to reenter the body, it is also impossible, then one leaves to explore different spheres, feeling lonely and anxious, and then return to the body, to repeat the same attempts, and to no avail, one is lost and seeking wherever seemed comfortable for refuge, with great danger of taking a undesirable rebirth. This is for someone without a Dharma practice most likely to experience during Bardo state.
According to Tibetan tradition, after death and before one’s next birth, when one’s consciousness is not connected with a physical body, one experience a variety of phenomena. These usually follow a particular sequence of degeneration from the moment after death. The clearest experiences of reality of which, one is spiritually capable, example; if you did something great for others, you would experience great joy. And then proceeding to terrifying hallucinations that arise from the impulses of one’s previous unskillful (Unwholesome)actions. These terrifying hallucinations are re flections of one’s previous actions. For example; if you kill someone before, at this time you’ll feel the pain of the person you harmed.
For the “prepared” and appropriately trained individuals, like a Buddhist practitioner,
the Bardo offers a state of great opportunity for rebirth. ( For those with pure spirit, follow the clear light when you leave the form body.) So, how can one “prepared” for the death? Most people don’t even want think about it, and some people think it’s inauspicious to talk about it, but the truth is that death will come, and no one is exception. Death is natural process from one life into the next. The Dalai Lama once said jokingly; ” …I am getting old, the good news is that I am getting a new body soon…”. So, death is not so scary, it’s scary because of “not knowing”. However, it is a good idea to be prepared, so we can at a peaceful state of mind with confident when the time of death arrives.
Death is the same for people of all people and religions. Christians follow the Bible’s teachings, be a true Christian, live the daily life of a Christian, not just go to the Church every Sunday will do. The same with Buddhist, or any other tradition. Fundamentally, follow the five major precepts; no killing, no stilling, no lying, no sexual misconduct, and no intoxication of any substance, alcohols, drugs etc. We can have better rebirth by generating good karma, which is doing all that is good, and avoid doing all that is bad.
In the Zhitro (Tibetan: Zhi-khro) teachings which subsume the Bardo Thodol and mention Karma Lingpa, terma, and Padmasambhava, and list the Six Bardo: “The first bardo begins when we take birth and throughout the live. The second is the bardo of dreams. The third is the bardo of concentration or meditation. The fourth occurs at the moment of death. The fifth is known as the bardo of the luminosity of the true nature (mind only without a physical form). The sixth is called the bardo of transmigration or karmic becoming (rebirth).