“My friends are my "estate."”

The Mission Song (2006)

These are notes in Latin that Newton wrote to himself that he titled: Quaestiones Quaedam Philosophicae [Certain Philosophical Questions] (c. 1664)
Variant translations: Plato is my friend, Aristotle is my friend, but my best friend is truth.
Plato is my friend — Aristotle is my friend — truth is a greater friend.
This is a variation on a much older adage, which Roger Bacon attributed to Aristotle: Amicus Plato sed magis amica veritas. Bacon was perhaps paraphrasing a statement in the Nicomachean Ethics: Where both are friends, it is right to prefer truth.

Source: The Coldest Girl in Coldtown

Speech in Aylesbury, responding to a heckler who accused Cobden of getting his property through Anti-Corn Law League funds (9 January 1853), quoted in John Bright and J. E. Thorold Rogers (eds.), Speeches on Questions of Public Policy by Richard Cobden, M.P. Volume I (London: T. Fisher Unwin, 1908), pp. 225-6.
1850s

Rolling Stone interview (2003)

Quoted in Miguel Helft, " Google and Salesforce Join to Fight Microsoft http://www.nytimes.com/2008/04/14/technology/14google.html?_r=1&oref=slogin", New York Times (April 14, 2008).