There are those who imagine that the unlucky accidents of lifelife's "experiences"are in some way useful to us. I wish I could find out how. I never know one of them to happen twice. They always change off and swap around and catch you on your inexperienced side.
In conclusion I wish to say that in working at the problem here dealt with I have had the loyal assistance of my friend and colleague M. Besso, and that I am indebted to him for several valuable suggestions.
Be always displeased with what you are if you wish to be what you are not. Always add, always walk, always proceed. Neither stand still nor go back nor deviate.
Those with the courage to explore the weave and structure of the Cosmos, even where it differs profoundly from their wishes and prejudices, will penetrate its deepest mysteries.