J. B. S. Haldane
I have come to the conclusion that my subjective account of my motivation is largely mythical on almost all occasions. I don't know why I do things.
We do not know, in most cases, how far social failure and success are due to heredity, and how far to environment. But environment is the easier of the two to improve.
So many new ideas are at first strange and horrible, though ultimately valuable that a very heavy responsibility rests upon those who would prevent their dissemination.