The phrase 'nature and nurture' is a convenient jingle of words, for it separates under two distinct heads the innumerable elements of which personality is composed. Nature is all that a man brings with himself into the world; nurture is every influence without that affects him after his birth.
Francis GaltonEugenics is the study of the agencies under social control that may improve or impair the racial qualities of future generations either physically or mentally.
Francis GaltonI do not so easily think in words.... after being hard at work having arrived at results that are perfectly clear... I have to translate my thoughts in a language that does not run evenly with them.
Francis Galton