My life has been enriched by excellent human relations, work and interests. I have never felt lonely.

I told Mother of my decision to study medicine. She encouraged me to speak to Father... I began in a roundabout way... He listened, looking at me with that serious and penetrating gaze of his that caused me such trepidation, and asked whether I knew what I wanted to do.

The instruments, glassware, and chemical reagents necessary for my project were the same as my 19th-century predecessors had.

At 100, I have a mind that is superior - thanks to experience - than when I was 20.

Babies did not attract me, and I was altogether without the maternal sense so highly developed in small and adolescent girls.

It is imperfection - not perfection - that is the end result of the program written into that formidably complex engine that is the human brain, and of the influences exerted upon us by the environment and whoever takes care of us during the long years of our physical, psychological and intellectual development.

It's not enough what I did in the past - there is also the future.