Marriage is an institution fits in perfect harmony with the laws of nature whereas systems of slavery and segregation were designed to brutally oppress people and thereby violated the laws of nature.

No tendency is quite so strong in human nature as the desire to lay down rules of conduct for other people.

If you can kill animals, the same attitude can kill human beings. The mentality is the same which exploits nature and which creates wars.

Living in Cambridge, with nature and everything, it's so clean.

Nature never makes any blunders, when she makes a fool she means it.