In Simone deBeauvoir's autobiography, ALL SAID AND DONE, 1972, she talks about something that I have often contemplated and indeed experienced. Her words capture this experience far better than I can:
"Every morning, even before I open my eyes, I know I am in my bedroom and my bed. But if I go to sleep after lunch in the room where I work, sometimes I wake up with a feeling of childish amazement — why am I myself? What astonishes me, just as it astonishes a child when he becomes aware of his own identity, is the fact of finding myself here, and at this moment, deep in this life and not in any other. What stroke of chance has brought this about?
The penetration of that particular ovum by that particular spermatozoon, with its implications of the meeting of my parents and before that of their birth and the births of all their forebears, had not one chance in hundreds of millions of coming about. And it was chance, a chance quite unpredictable in the present state of science, that caused me to be born a woman. From that point on, it seems to me that a thousand different futures might have stemmed from every single movement of my past: I might have fallen ill and broken off my studies; I might not have met Sartre; anything at all might have happened.
Tossed into the world, I have been subjected to its laws and its contingencies, ruled by wills other than my own, by circumstance and by history: it is therefore reasonable for me to feel that I am myself contingent. What staggers me is that at the same time I am not contingent. If I had not been born no question would have arisen: I have to take the fact that I do exist as my starting point. To be sure, the future of the woman I have been may turn me into someone other than myself. But in that case it would be this other woman who would be asking herself who she was. For the person who says “Here am I” there is no other coexisting possibility. Yet this necessary coincidence of the subject and his history is not enough to do away with my perplexity. My life: it is both intimately known and remote; it defines me and yet I stand outside it."