“Of any activity you do, ask yourself: If I were the last person on earth, would I still do it?”

Source: Dear John

#121
Vectors: Aphorisms and Ten Second Essays (2001)

Kevin Strom, "All America Must Know the Terror That is Upon Us" http://www.amfirstbooks.com/IntroPages/ToolBarTopics/Articles/Featured_Authors/strom,_kevin/kevin_strom_works/Kevin_Strom_1991-1994/Kevin_A._Strom_19930814-ADV_All_America_Must_Know_the_Terror_That_Is_Upon_Us.html (1993)
Misattributed
Variant: "To learn who rules over you, simply find out who you are not allowed to criticize."

Response to John Lambert's remarks that he "was glad to see we had the nation on our side" as they were cheered by a crowd in June 1650; as quoted by Gilbert Burnet in History of My Own Time http://books.google.com/books?id=-iswAAAAYAAJ&q="do+not+trust+to+that+for+these+very+persons+would+shout+as+much+if+you+and+I+were+going+to+be+hanged"&pg=PA145#v=onepage (1683); also in in God's Englishman by Christopher Hill (1970), Ch. VII, p. 188

All and Everything: Views from the Real World (1973)
Context: LIBERATION LEADS TO LIBERATION. These are the first words of truth — not truth in quotation marks but truth in the real meaning of the word; truth which is not merely theoretical, not simply a word, but truth that can be realized in practice. The meaning behind these words may be explained as follows:
By liberation is meant the liberation which is the aim of all schools, all religions, at all times.
This liberation can indeed be very great. All men desire it and strive after it. But it cannot be attained without the first liberation, a lesser liberation. The great liberation is liberation from influences outside us. The lesser liberation is liberation from influences within us.
At first, for beginners, this lesser liberation appears to be very great, for a beginner depends very little on external influences. Only a man who has already become free of inner influences falls under external influences.
Inner influences prevent a man from falling under external influences. Maybe it is for the best. Inner influences and inner slavery come from many varied sources and many independent factors — independent in that sometimes it is one thing and sometimes another, for we have many enemies.
There are so many of these enemies that life would not be long enough to struggle with each of them and free ourselves from each one separately. So we must find a method, a line of work, which will enable us simultaneously to destroy the greatest possible number of enemies within us from which these influences come.
I said that we have many independent enemies, but the chief and most active are vanity and self-love. One teaching even calls them representatives and messengers of the devil himself.
For some reason they are also called Mrs. Vanity and Mr. Self-Love.
As I have said, there are many enemies. I have mentioned only these two as the most fundamental. At the moment it is hard to enumerate them all. It would be difficult to work on each of them directly and specifically, and it would take too much time since there are so many. So we have to deal with them indirectly in order to free ourselves from several at once.
These representatives of the devil stand unceasingly at the threshold which separates us from the outside, and prevent not only good but also bad external influences from entering. Thus they have a good side as well as a bad side.
For a man who wishes to discriminate among the influences he receives, it is an advantage to have these watchmen. But if a man wishes all influences to enter, no matter what they may be — for it is impossible to select only the good ones — he must liberate himself as much as possible, and finally altogether, from these watchmen, whom some considerable undesirable.
For this there are many methods, and a great number of means. Personally I would advise you to try freeing yourselves and to do so without unnecessary theorizing, by simple reasoning, active reasoning, within yourselves.

Live at the Apollo (November 26, 2007)

Remarks after Oxford University voted not to award her an honorary degree. Mail on Sunday (3 February 1985), quoted in John Campbell, Margaret Thatcher. The Iron Lady (London: Jonathan Cape, 2003), p. 399.
Second term as Prime Minister

Source: Revelations of Divine Love