“At all times pseudoprofound aphorisms have been more popular than rigorous arguments.”

As quoted in "First African American Senator" http://www.senate.gov/artandhistory/history/minute/First_African_American_Senator.htm, United States Senate

The Relation of the State to the Invididual (1890)
Context: Anarchism, in dealing with this subject, has found it necessary, first of all, to define its terms. Popular conceptions of the terminology of politics are incompatible with the rigorous exactness required in scientific investigation. To be sure, a departure from the popular use of language is accompanied by the risk of misconception by the multitude, who persistently ignore the new definitions; but, on the other hand, conformity thereto is attended by the still more deplorable alternative of confusion in the eyes of the competent, who would be justified in attributing inexactness of thought where there is inexactness of expression. Take the term "State," for instance, with which we are especially concerned today. It is a word that is on every lip. But how many of those who use it have any idea of what they mean by it? And, of the few who have, how various are their conceptions! We designate by the term "State" institutions that embody absolutism in its extreme form and institutions that temper it with more or less liberality. We apply the word alike to institutions that do nothing but aggress and to institutions that, besides aggressing, to some extent protect and defend. But which is the State's essential function, aggression or defence, few seem to know or care. Some champions of the State evidently consider aggression its principle, although they disguise it alike from themselves and from the people under the term "administration," which they wish to extend in every possible direction. Others, on the contrary, consider defence its principle, and wish to limit it accordingly to the performance of police duties. Still others seem to think that it exists for both aggression and defence, combined in varying proportions according to the momentary interests, or maybe only whims, of those happening to control it.

2010s, 2018, A note to readers (2018)
Context: I believe that the pursuit of truth and right ideas through honest debate and rigorous argument is a noble undertaking. I am grateful to have played a small role in the conversations that have helped guide this extraordinary nation’s destiny.
I leave this life with no regrets. It was a wonderful life — full and complete with the great loves and great endeavors that make it worth living. I am sad to leave, but I leave with the knowledge that I lived the life that I intended.

One of the most controversial statements Lennon ever made, this was published in England's Evening Standard newspaper (4 March 1966) as part of an interview with writer Maureen Cleave.
Context: Christianity will go.. It will vanish and shrink. I needn't argue with that; I'm right and I will be proved right. We're more popular than Jesus now; I don't know which will go first — rock and roll or Christianity. Jesus was all right, but his disciples were thick and ordinary. It's them twisting it that ruins it for me.

Down on Me and Janis Joplin
Woodstock Nation (1969)

In Quest of Democracy (1991)

Source: The Salmon of Doubt (2002)

Half-Truths and One-And-A-Half Truths (1976)