It behoves everyone to think about the cause of all causes , Richard Feynman says it fun to think of the causes of a cause . One should do so by applying rationale and logic as much as possible ,but remember our senses and minds and intellects have limitations . Nevertheless, we can use them in sensible and objective ways .
For instance in the distance you see smoke in a mountain , one cannot necessarily conclude there is fire , because the fire may have been extinguished by water just recently , or it might be vapour from a mountain cave .
How will you know ? By hearing from a credible source who has insight and knowledge and has seen if there is fire still burning.

Thus, pure sound will indicate truth , more so than impressions of the sences,  or previous experiences we have had or even previous ancestors who have recorded and realised by experiences , although some truths can be gathered in those ways , but not all truth .

The Vedas say seek Sabdha Brahman pure sounds coming from pure persons who have by  discerning and understanding the Vedas and who live by the Vedas can vibrate and realise truth. Once one thing is known, everything is known,  which applies to realising Divinity.
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