"The person is always happy who is in the presence of something they cannot know in full. A person as advanced far in the study of morals who has mastered the difference between pride and vanity"
"I was married to Margaret Joan Howe in 1940. Although not a scientist herself she has contributed more to my work than anyone else by providing a peaceful and happy home"
"Try to be happy in this present moment, and put not off being so to a time to come, as though that time should be of another make from this which has already come and is ours"
