Bill Wiltrack wrote:Truth isn't found in a book. Truth isn't an experience of some thing outside of the body. Truth is within. Truth is experienced within a moment, ...if you turn yourself inside-out AND, you are extremely lucky. A moment that becomes eternity.
A specific truth, OTOH, involves what has been turned into a description / statement and procedurally verified or has been historically / uncritically accepted by a majority or smaller group. IOW, it's quite likely to be found in a book or text.
A general usage of the word "truth" may refer to either overall conformity to a particular system / standard which humans have invented / developed or just the overall commonsense interpretation of the reality encountered in sensation. The latter marred by occasional instability, of potentially varying (usually trivially) according to personal experiences or even cultural background.
What you seem to be referring to is some sort of raw, private revelation - immediate apprehension rather than falling out of extended reflective thought or research - that has not been converted yet to a communicated conception, treatise, or linguistic understanding.
Ideally, any "grand truism" referencing something beyond the verification methods that feed scholarly, skilled, governmental authority / formal conventions and everyday, functional folk traditions can never have sufficient evidence for itself (in the limitations of this natural life). Apart from an arguing for it as necessary (since the option of just "practical / useful for ___" is an admission of dodging claims of its essential universality or being an exalted truth). In actuality, however, supersensible "purely intellectual apprehensions" have over the ages wormed their way into the established organizations of "facts" / common acceptances. As well as infiltrations by those private, non-reasoned epiphanies you mention, which eventually got around to being described to others and attached with indirect significances.