Day one-Starting to write

Please, do not pay attention to the meaning of the text. It represents some scraps from my mind that should not be considered as a part of discussion. Grammar and vocabulary corrections and comments are welcome.

It has occured me today. Plain and simple as it always is. In one's life, it is almost impossible to remember, to hold the memories of the two most important life events, the begining and the end. Correct me if I'm wrong, but I still haven't met a single person that can talk about his/her own birth. Nor the death. We can hold memories on graduating, learning about love, to drive, the first kiss, fun times, happy times, sad times, boring times. But we can't hold memories on our own birth nor the death.
Why are we denied for those two simple, most important events in our life time beeing?
Is it to painful to hold the memories or it's just lack of capability to process that amount of happiness (birth) and sadness (death) for ordinary human brain.