Life has a beginning and end as we know it on this plane. Interestingly, once life begins it is perpetual motion akin to time until that life ends. What I find amazing is how many souls concentrate on the past which they cannot change, instead of moving forward with time and their life to effect a change. Our life spans are only a drip in comparison to all the water on Earth.
Therefore, you only have this life to make your drip ripple the water. The ripple you create can impact change in the present and the future. Nevertheless, it will not change a damn thing in your past or time's past. So, stop looking back and concentrating energy where it will never make a difference. Look forward and create wakes and waterfalls that feed the Earth and its inhabitants.