“Neither is it accidental that the Upanishads contain no internal evidence as to when, where or by whom they were composed. Their very thesis is that we dwell in the midst of a timeless eternity. With everything so indissolubly united that particular areas or places are of no concern. Who might be the author of an idea or a way of communicating it must be of no importance whatsoever, since truth is truth.”

Source: Ideas have Consequences (1948), p. 68.

A Retort, from Gerald Massey's Lectures c.1900; often cited as They must find it difficult, those who have taken authority as truth, rather than truth as authority.
Based on a quote of Lucretia Mott, "… my convictions led me to adhere to the sufficiency of the light within us, resting on truth as authority, rather than “taking authority for truth.”", quoted in " Eminent women of the age http://books.google.de/books?id=gGFEDpWYWpwC&pg=PA375" By James Parton et. al., (S.M. Betts & Company, 1868, p375).

Frank v. Maryland, 359 U.S. 360, 372 (1959); majority opinion in 5-4 ruling that allowed health inspectors to enter a private home without a search warrant (May 4, 1959).
Judicial opinions

What is a Poem - Endword - Selected Poems (1926)

BBC News, ' Scottish independence: One million Scots urged to sign 'yes' declaration http://www.bbc.co.uk/news/uk-scotland-scotland-politics-18162832' (25 May 2012).
Context: We unite behind a declaration of self-evident truth. The people who live in Scotland are best placed to make the decisions that affect Scotland. We want a Scotland that's greener, that's fairer and more prosperous. We realise that the power of an independent Scotland is necessary to achieve these great ends... By the time we enter the referendum campaign in autumn 2014, our intention is to have one million Scots who have signed the independence for Scotland declaration. Friends, if we achieve that, then we shall win an independent Scotland.

1960s, Where Do We Go from Here: Chaos or Community? (1967)
Context: Communism forgets that life is individual. Capitalism forgets that life is social, and the kingdom of brotherhood is found neither in the thesis of communism nor the antithesis of capitalism but in a higher synthesis. It is found in a higher synthesis that combines the truths of both. Now, when I say question the whole society, it means ultimately coming to see that the problem of racism, the problem of exploitation, and the problem of war are all tied together. These are the triple evils that are interrelated.

Annotated Drawings by Eugene J. Martin: 1977-1978

Source: Indian Thought And Its Development (1936), Ch. XVI : Looking Backward and Forward, p. 256
Context: We await the Indian thinker who will expound to us the mysticism of spiritual union with infinite Being as it is in itself, not as it is set down in the ancient texts or according to the meaning read into them by their interpreters.
It belongs to the nature of mysticism that it is timeless and appeals to no other authority than that of the truth which it carries within it.
The pathway from imperfect to perfect recognised truth leads through the valley of reality.