You are an ephemeral phenomenon of life arising due to dynamic interaction of your indispensable constituent cause and conditions. You do not exist without or independent of your indispensable constituent cause and conditions.
As you know for example, you exist as effect of the actions of your ancestors and you are due to conditions of your life-processes, your actions and effect of those actions. Though your are an ephemeral phenomenon of life, you continue in the effects of your intentional actions, for example, your children and your contribution to society and environment.
You are awareness, the phenomenon of knowing, arising due to dynamic interaction of your indispensable constituent cause and conditions. You are a phenomenon, just like rainbow, horizon or brightness only appear to exist but does not really exist independent of constituent cause and conditions.
You are not the inner knower independent of your constituent cause and conditions. You are neither eternal nor immortal in any way. Hence you must live this opportunity of life as best as you can and make the conditions of life as good as you can.
Since independent eternal immortal inner self or inner being is an hallucination, you do not exist without your indispensable constituent cause and conditions including parents, body, process of life, actions and effects of actions just like brightness cannot exist without lamp, fuel, wick, light and dispersion of light.
All forms and phenomenon are due to harmoniously coming together of its indispensable constituent cause and conditions. Everything beyond constituent cause and conditions, for example patterns and phenomenon, arises due to dynamic interaction of constituent conditions, disintegrate with the disintegration of constituent conditions and gets recycled.
There is no eternal or immortal inner self or soul inside you or any life form. Experiences beyond life, for example past life memory or out-of-body experiences, are due to psychological and physiological conditions shaped by early life or past impressions formed and forgotten unknowingly.
There is neither past birth nor next birth because there is nothing eternal or immortal about life that is independent of its constituent cause and conditions.
Change and impermanence is a universal constant that disintegrates, disperses and recycles everything without exception.
Since, you continue in the effect of your intentional actions, you should act ethically and leave a benevolent effect of your action. The effect of your actions will find it’s place just like water, air, earth, heat finds it’s space in the cycle of nature and life.