“It is inevitable that the mind which does not have a place to turn to or any stable base will undergo change from hour to hour and from minute to minute due to the variety of its distractions, and by the things that come to it from outside it will be continually transformed into whatever occurs to it at any given moment.”

An explanation of relativity which he gave to his secretary Helen Dukas to convey to non-scientists and reporters, as quoted in Best Quotes of '54, '55, l56 (1957) by James B. Simpson; also in Expandable Quotable Einstein (2005) edited by Alice Calaprice

William Hermanns recorded a series of four conversations he had with Einstein and published them in his book Einstein and the Poet (1983), quoting Einstein saying this variant in a 1948 conversation: "To simplify the concept of relativity, I always use the following example: if you sit with a girl on a garden bench and the moon is shining, then for you the hour will be a minute. However, if you sit on a hot stove, the minute will be an hour." ( p. 87 http://books.google.com/books?id=QXCyjj6T5ZUC&lpg=PP1&pg=PA87#v=onepage&q&f=false)

In the 1985 book Einstein in America, Jamie Sayen wrote "Einstein devised the following explanation for her [Helen Dukas] to give when asked to explain relativity: An hour sitting with a pretty girl on a park bench passes like a minute, but a minute sitting on a hot stove seems like an hour." ( p. 130 http://books.google.com/books?ei=yma3TsDWK8WciQL63smAAQ&ct=book-thumbnail&id=vs3aAAAAMAAJ&dq=sayen+%22einstein+in+america%22&q=pretty+girl#search_anchor)
Attributed in posthumous publications
Variant: When you are courting a nice girl an hour seems like a second. When you sit on a red-hot cinder a second seems like an hour. That's relativity.

Belgium v. United States https://www.youtube.com/watch?v=yDiUIvLAHWg&feature=youtu.be (1 July 2014), 2014 FIFA World Cup, Brazil
2010s, 2014

Original: (it) È vero amore, quando la persona nella tua mente ruba intensamente l'ora, il minuto... l'attimo di tutta la giornata.
Source: prevale.net

Source: Language, Truth, and Logic (1936), p. 47.

Source: Working Class Zero (2003), Chapter 4, p. 31

Morarji Desai speaks about life and celibacy

Ezek. ix. 9
Source: Guide for the Perplexed (c. 1190), Part III, Ch.17

Kearsley, 604
Bartlett's Familiar Quotations, 10th ed. (1919), Johnsoniana